For those who said "Blizzard does exactly the same thing with Battle.net".
Ubisoft isn't in the same league as Blizzard.
Battle.net is a service for Blizzard's ONLINE games.
Ubisoft's DRM forces the player to sign up for their service just to play a single player game.
If Ubisoft want to use copy protection then use Steamworks integration or even GFWL. NOT this!