I often find it funny people's attitude to games and consoles. The recent batch of social and "casual" games has helped widen the benefit and appeal. Just take this typical family gathering.
Years ago people would have gathered around the piano for a sing song. Now... well after years of 1st person shooters, fighting and driving the PS3 has this Singstar.
People often worry about whether they can sing, but it just does not matter if its fun.
Not all games are the same, not all games are violent, though singing final countdown can do some damage on this :-)