Have they thought this through?
Irrate Inc.: Your network is being used to illegally distribute our software.
AT&T: Code in with your MPAA/RIAA credentials.
Irrate Inc.: We don't have any. We make software, not garbage.
AT&T: Are you with the government? We can give you anything you like if your with them.
Irrate Inc.: No, we're a corporation, like you.
AT&T: Oh. Sorry. It's impossible for us to do anything. Would you like to sign up for our priority tier? You'll be able to find infringers using our tubes twice as fast, with less waiting, guaranteed!
Irrate Inc.: No, thank you. Please stop your customer(s) from illegally distributing our software immediately.
AT&T: No. We're a carrier, not a content provider. We're protected and there's nothing you can do about it. We don't have to police the content on our network. Ignore the Hollywood dragnet.
Irrate Inc.: All lawyers on deck!
And after the first bit is filtered, AT&T is liable.