If you don't want cheaters or pirates alike dominating this game in their masses, would it be a good idea to fix the loophole that allows people to play an illegal cracked version with a fake serial inbetween the times of 17:00 and 23:00 GMT?
It's something that happens inbetween these times server-side that the crackers are exploiting, key validation shouldn't really be switched off during a time when most people are most likely going to come home from work/college etc and play the game.