Thanks acal
Now on topic:
I have friends without Internet connection: they say there are more important things in life to spend money than Internet. So Online-Activation-only games are a no go for them. But if the devs allows a way to check the DVD if no on-line connection is possible they buy and play the game.
Devs must give alternatives.
Removing the activation after a period of time won't help sells many more game since new games comes out almost every week.