^Thats becaus you Polish are cheapskates.
Seriously, thank god for people who give a shit when I don't.
Most of those protesters are intelligent people who are aware of the consequences that go far beyond piracy, but I agree that there were also some kids who were afraid that they won't be able to download their favorite TV series off the internet. But that's a really small group.
If ACTA was really well-written and designed to fight against huge copyright-breaking websites and pirates who upload shitloads of illegal things on the internet I really wouldn't mind (though the piracy issue is controversial). But it's not the point with ACTA in reality. It's a garbage as far as laws in it are concerned and all can be interpreted in all kinds of possible ways, including really unfortunate ones that companies with decent lawyers can easily take advantage of.
What is the worst for us here, what we protest about is that it comes with included privacy-breaking procedures - ISPs will have to monitor what you do on the internet and build systems crafted for this so they will have to send your personal data to the company whose patents you are infringing so they can directly get their cash from you. If ISPs decline, they will pay instead.
Also it assumes that you're a pirate. It's not them who will have to prove that you're doing something illegal on the internet. As soon as they will have a REASON to believe that you're doing something illegal you will have to prove that you're okay, and they will have your computers, documentations etc taken from you in the process. ACTA works ABOVE the national law. It's an easy win for anyone who is willing to sue you over their patents/copyrighted material, especially corporations since it makes the job very easy for their lawyers to fuck you up and you cannot do anything about it since ACTA is really poorly written and contains a lot of statements that no competent lawyer should ever come up with.
Oh, it's also worth to mention that ACTA was created and signed behind everyone's backs. It was made by and consulted only with huge media companies.
There are also some other things like that they will be able to check your hard drives on the airports, remove your websites from the internet as soon as they suspect that it's infringing any kinds of copyright laws (this means that if someone tried hard enough they could shut down Facebook because someone posted a copyrighted lolcat picture) without sending a prior notice etc. etc.
That's what we're protesting about and it has nothing to do with piracy or counterfeit products - if it comes to the latter I'm all for it but it's extremely dumb that they are putting it in the same box with freedom of speech and knowledge/information exchange. In the end we get a really ridiculous agreement that should not exist, and they're signing it despite the fact that nobody (except of some huge companies that came up with it) want. ACTA should be all about conterfeit products, they should come up with a different agreement for the internet and copyright laws, that would be fair for everyone and well-written.