There arew many legal things, that are allowed to be shared through file sharing. Just not the things that you are looking for.

You can find lots of free music, videos, small games and programs. You cannot use the network to download the latest Hollywood movies or top 40 music and expect it to be fully legal. That would be a ignorance is bliss approach.

Also it depends a lot on the country. Like where I live, we get no letters from our ISP about infringing copyright. They don't cap our bandwidth. And if someone asked who is connected to an IP, they would consider that a breach of privacy over something as small as downloading some music file or the likes.

Not like the good old US