Perpetrators: Ubisoft, Activision Blizzard
Worst Example: Diablo 3
Piracy's a bitch, but that's no reason to punish your loyal customers by slapping DRM that requires them to be online to play the game all over your product. Seriously, of all the hare-brained schemes to keep pirates at bay, this has to be the one that gets in the way of legitimate customers the most. Now you can't even play your game on the go unless you have a mobile data connection, and even worse is when the servers are out due to no fault of your own, leaving you completely unable to enjoy what you bought.
Combine this with ever-increasing legislation that makes it illegal to circumvent these draconian implements and you've got a situation that treats customers like thieves. The worst part is that this doesn't prevent people from pirating the games, and often the cracked versions are better simply by the fact you don't have to put up with this bullshit.
The Solution: Just stop doing it!