I don't think they will, it's like impossible to hack most of those games. Fortunately, we don't care because they're not DoSing Steam
Some handicap on Gmod told me that in 30 minutes, my computer and PC fans (I know, he's a loving idiot) will shut down and they won't turn on again, saying "Good luck turning them on again". This happened yesterday and they still work. Good luck turning them off, more like.