Before I start, we don't start piracy on this site. We backup music, movies and game we paid for and own.
Yes, there are many dud files on P2P to hook people who doesn't want to paid for the real thing into downloading them. Some are harmless empty files, while others have messages in them say "fsck you, go buy my album," and yet another has virus in them. The latter is very very common.
How to you deal with it? Go out, buy the original, and support the artist. @#$%ing free loaders.:Z