I swear I once wrote a game review in which I talked about whether speeding around in a racing game could make people speed in real life, but I don't know when. Anyway, one study claims that, in fact
racing video games encourage real-life speeding. The authors of the study say the results are "indisputable," but from the article it sounds like they just asked people if they drove more dangerously, and I wouldn't call people's opinions of their own actions indisputable evidence of anything.
On the other hand, drive game fans seem to be a bit better at passing driving tests, so perhaps they're faster but better, which might even out.