Try watching an NFL game on justin.tv. Sure, you can find one. But the majority of the links are spam and attempts to get you to sign up at some other streaming

Try watching an NFL game on justin.tv. Sure, you can find one. But the majority of the links are spam and attempts to get you to sign up at some other streaming site. When you do actually manage to find a game, it will often stop without warning. So yes, they apparently do respond pretty promptly to DMCA takedown requests.