Meanwhile millions just illegally download the movies and tv shows of various sites, completely ignoring copyright law. And there isn't anything these people can do about it. But hey, lets do a lot more suits against companies and at least force them to do crazy things.
Technically, the letter of the law only highlights transmission (uploading) as illegal in most copyright issues. Downloading most any material seems completely legal. That'd be neat to see: a bittorrent case which the user turned the upload to 0.0 . Are they infringing?
Uploading is easier to sue, because there the damages (the number of files made available) is much larger and it makes things more cost effective. It also (possibly?) acts as a deterrent to other uploaders.
Criminal charges tend to come in when money is being made from copyright infringement. Selling burnt DVDs, for example.
I'm being a bit vague because of the international audience. (I'm in the UK.)