Spain has become one of Europe's most aggressive countries in the fight against illegal football streaming.
For months, La Liga has been working with internet service providers and the Spanish courts to block access to websites and servers used to distribute unauthorised live football broadcasts.
The objective is straightforward: make it as difficult as possible for viewers to watch pirated matches.
However, a growing body of evidence suggests the campaign has had a serious unintended consequence.
According to researchers from the Open Observatory of Network Interference (OONI), more than 500,000 legitimate websites have also been caught up in the blocking measures, affecting everything from charities and businesses to scientific organisations and everyday online services.
The findings have reignited the debate over whether the fight against piracy is beginning to cause more harm than good.
How the Blocking Works
Unlike traditional website blocking, which targets a single domain name, many of La Liga's anti-piracy measures focus on IP addresses used to distribute illegal football streams.
That approach sounds sensible until you consider how today's internet works.
Many websites share the same server or Content Delivery Network (CDN), particularly services provided by companies such as:
Cloudflare
Amazon Web Services
Microsoft Azure
Akamai
Meta
A single IP address may therefore host hundreds—or even thousands—of completely unrelated websites.
When that IP address is blocked during a football match, every website using it can become temporarily inaccessible.
More Than Half a Million Websites Affected
OONI's report paints a striking picture.
Researchers analysed internet connectivity across Spain between January and June 2026 and found that at least 554,000 domains experienced blocking at some point during La Liga match broadcasts.
In many cases, blocking just four to twenty IP addresses during a single match was enough to disrupt access to more than 400,000 legitimate websites.
Overall, approximately 5.8% of the 9.2 million domains monitored by OONI were affected during the study period.
Legitimate Websites Caught in the Crossfire
The report found that many completely unrelated organisations became inaccessible while football matches were taking place.
Examples included:
Amnesty International
Greenpeace
Berkeley Earth
Business websites
Educational services
Online messaging platforms
Charity websites
None of these organisations had any connection to football piracy.
Their only link was that they happened to share internet infrastructure with websites that were allegedly streaming matches illegally.
Why Shared Infrastructure Creates Problems
Modern websites rarely operate from dedicated servers.
Instead, cloud providers host enormous numbers of websites behind the same IP addresses to improve efficiency, security and performance.
Cloudflare alone protects millions of websites worldwide.
When a court orders internet providers to block one of those shared addresses, every customer using that infrastructure risks becoming collateral damage.
OONI identified Cloudflare as the provider most heavily affected, with more than 500,000 domains impacted through IP-based blocking.
A Growing Backlash
The findings have prompted criticism from digital rights organisations, internet infrastructure providers and some technology experts.
Critics argue that blocking shared IP addresses is too blunt an instrument for tackling modern piracy.
Instead of targeting the specific illegal stream, entire sections of the internet can become unavailable for the duration of football matches.
Some internet providers have also questioned whether rights holders should bear greater responsibility when legitimate businesses lose access because of anti-piracy enforcement.
Privacy Concerns
The OONI researchers also reported evidence suggesting that some users experienced TLS Man-in-the-Middle (MitM) behaviour on certain networks during blocking periods.
While the exact implementation varied between providers, the findings raised additional concerns about privacy and internet security alongside the website outages themselves.
Although these observations require continued investigation, they have added another layer to an already controversial debate.
Why La Liga Is Taking Such Strong Action
From La Liga's perspective, the campaign is driven by the enormous value of television broadcasting rights.
Broadcasters pay billions of euros for exclusive football coverage.
Illegal IPTV services and pirate streaming websites undermine that investment by offering unauthorised access to live matches.
La Liga argues that decisive enforcement is essential to protect clubs, broadcasters and the wider football industry from the financial damage caused by piracy. The league has consistently defended its anti-piracy strategy and maintains that protecting audiovisual rights is vital to the future of professional football.
Could Other Countries Follow?
Spain is often viewed as a testing ground for new anti-piracy techniques.
If the strategy proves legally successful, similar approaches could be adopted elsewhere in Europe.
However, the scale of the collateral damage revealed by OONI is likely to make regulators and courts think carefully before authorising widespread IP-based blocking.
Broadcasters face a difficult balancing act.
They need effective tools to combat organised piracy, but those measures also need to avoid disrupting legitimate internet users and businesses.
Finding that balance may prove one of the biggest challenges in future anti-piracy policy.
The Bottom Line
Spain's campaign against illegal football streaming demonstrates just how determined rights holders have become in protecting valuable broadcasting rights.
But it also highlights the risks of using broad technical measures in an internet built on shared infrastructure.
According to OONI's research, more than half a million legitimate websites were affected by IP blocking during La Liga broadcasts, with charities, businesses, educational services and other unrelated websites temporarily becoming inaccessible alongside the pirate streams being targeted.
Few would argue against tackling organised IPTV piracy, particularly when broadcasters invest billions in sports rights. The controversy lies in how that battle is being fought. As anti-piracy technology becomes more sophisticated, the challenge for regulators, football leagues and internet providers will be ensuring that legitimate users are not caught in the crossfire.
The outcome of Spain's approach could influence anti-piracy policy across Europe for years to come, making this far more than a local issue. It has become an important test of how to protect copyright in an increasingly interconnected internet without unintentionally disrupting the wider web.