Destructoid points out in this story that Ubisoft's plan to take down servers next week shows why "always on" DRM is a bad idea. During the maintenance the publisher has planned next week, any game that has "always online" DRM will not be playable. That means that legitimate copies of games won't work. Which games will be broken next week? Owners of PC games such as HAWX 2, Might & Magic: Heroes 6, and The Settlers 7; owners of Mac titles including The Settlers, Assassin's Creed and Splinter Cell: Conviction; and any other games that require a login to a DRM server.
Also affected will be all online modes for various games.
Ubisoft will start transitioning its online services from on February 7 but did not say when the process would be complete.