Any place could be linked to child porn. Poles are often used to hold signs, for rewards for missing dogs, lawn mowing services and that sort of thing. If someone posts some kind of solicitation for child porn on a pole, is the city that owns the pole somehow liable or responsible? Of course not. If the city also puts signs up on the pole, advertising their services, does that change things? No. Why should it be any different for a web site? So it's not useful to drag child porn into the discussion. That's like saying water is wet. And applying a double standard. Person A got wet, and it's no big deal, but person B also got wet, and on the Internet, oooo!
Better is to compare the Pirate Bay to a dating site which runs ads. The site is profiting off of love, showing ads to people who are trying to find a date. Nothing immoral about that. But imagine that the dating site is trying to operate under a very prudish public and government who doubts the morality of their activities, accusing them of enabling prostitution, and constantly threatening not to go after prostitution only, but to shut the whole thing down under the thought that it's all prostitution anyway. Law enforcers are egged on by powerful interests that aren't interested in justice, but rather are interested in eliminating competition any way they can. Dirty pool.
But they are also spreading a political message, saying that they see nothing wrong with prostitution. There's nothing wrong with that either. We do have freedom of speech. If the users of the site turn towards prostitution or are already mostly prostitutes and "Johns", does that somehow change the morality? No! To shut down the site is about the same as tearing out a pole because someone advertised sexual services on it. Ripping out the pole is not going to stop anything, solve any problem, or convince anyone of the error of their ways. There are other poles. They can't all be torn out, and even if they could, people could use walls instead. Also, tearing out poles is damaging. Innocent 3rd parties, perhaps trying to find their lost doggies, will be harmed.
The Pirate Bay should be left alone. They didn't do anything wrong. We know very well that they are being made into scapegoats for what their users do. Why don't authorities go after the users, as they ought since those are the people who are actually guilty of violating the law as it stands currently? They've tried, and managed to torture a few victims, make examples of them, rather like the Inquisition used to do. But they've seen that they simply can't do it. They would have to charge half the world with piracy. If they can't scare people away from copyright infringement, or convince people it's immoral, no force available to the law can stop it. No technical measure can stop it either. They are trying very hard now to save face, refusing to admit that they can't stop it, refusing to talk about it, and still hoping that somehow the public will come around to their viewpoint. It won't happen. They are definitely refusing to admit that they are actually the ones in error. And that the law will have to change. The Inquisition discredited itself centuries ago. It was a stupid idea from the start, trying to frighten and bully people into being better Christians according to their narrow definition of what it meant to be a good Christian, which excluded Protestants. Today, Protestants enjoy the same rights and protections as Catholics, and the Inquisition is properly seen as at best a tragic mistake and at worst a vehicle for sadists and torturers to have a little fun. Now here we are, repeating that mistake but this time with copyright law.