They dont censor your words at all, you can post it. But freedom of speech is still limited, while that law says you are allowed to do such things, it doesnt mean it has no consequences. Things can backfire eventualy.
For piracy, and most crimes. If you are asking someone to do something illegal (internet or personaly has no diffirence), then you are doing an illegal thing. Now sure, the way its asked on the internet has a few things going with it that might weaken punishment (or avoid it entirely), since its harder to prove whether you aware of its illegal state. This is the difficult part, but at the same time also easy to prove when doing this several times (only 1 person has to point to you its illegal, and from that point on asking it again means you should be aware of it).
Your argument of expecting it to be pirated does not mean you should participate in it. It doesnt weaken the illegal state at all.
The biggest issue is proving it happens, and especialy with forums like these, its going to be far too much hassle, with potentialy no gain. And that last part is what defends most of the users. Even just trying to obtain the user info for the relatively few users that ask for a free link, its something that is most likely not going to result in anything usefull. Anti piracy companies are well aware of this. Hence they usualy want the site to enforce more strict rules instead (shifts the tasks away from them). And if the site owner doesnt do this, he might become responsible instead. This is where the users are at risk (as when the site owner obeys, those users now face bans)! Anti piracy companies are still active at this.
Also, piracy is not theft, so on that it already falls under a diffirent scale. And even the types of piracy can be very diffirent (downloads and uploads are in most countries generaly not worth it to go after as you are not going to make profits. not all countries have punitive damages applied - a good thing!).
And as this site is relatively niche… it most likely wont be at risk. But as its not 0 either…
Note that even a VPN isnt fully anonymous. VPN companies might say they dont log anything, but in many countries that would instantly also be the self destruct button. Quite a lot of logging is required (who is buying the vpn, and usualy which ips were tied to users during certin times). VPN companies only provide anonimity since without those official requests, that information isnt going to be released. And its short lived information as well (but generaly still several weeks).
VPN companies that do not obey this are often listed and can be blocked. Not to mention that your payment info reveals an instant red flag (they dont even need to know what you did to already flag you as potential criminal).
But in the end, most users can be expected to be safe because most of the time the takedown requests do go to the sites on which the content was hosted anyway. And as those sites generaly have very good procedures, why bother with a niche site? As you stated, piracy is expected to happen anyway. As long as you can get all the big companies to work with you, you generaly can filter out most of the content effectively. It makes the search for the content hard enough (and that proves it is effective).
And yes, your search info can be used against you! Just to mark how far they can go. And most big search engines will reveal the information on official requests. But to repeat. Its most of the time not worth it. Sharing some already spreaded videos, vs taking down massive content leakers is a big diffirence. Those bigger uploaders are the ones they want as that is 1000x more effective (and can actualy generate profit).