I was in the Air Training Corps, and we went away to some RAF base one weekend. My mate brought his PSP along, and I was playing Monster Hunter on my bunk whilst everyone went out to socialise and stuff. Thank God I'm not as bad as that these days.
Me and the same friend whose PSP I was using were obsessing over Super Smash Bros. Brawl before its release, but once again we had to do something with the Air Training Corps the day it was released. We gave my mum £80 to go to GAME and get it for us. We had to wait until 11am (we had to leave at 6am for this event) to find out if she had got the games for us. Turned out she was the first person into the shop (shes 4'11, she managed to get under the barrier as it was rising).
Sorry I described this in a lot of detail, just can't think of anything really bad that I have done with games. This one guy I know, however, would determine if someone was cool if they had an Xbox 360 (when he was 15), and I swear a couple of times was rewarded with new games if he did his homework. He was 9 years old at the time!