If he really does try to hurt people that shows a higher level of aggression, which is another symptom of steroid abuse.
Anyhow at this point there is no one in any main sports aside from car racing, golf and basketball that it would surprise me to hear was roiding (and some bball players are suspect). I would like to see Congress pass some strict, intelligent laws on steroids, HGH, amphetamines, etc. that involved at least weekly testing. If pro sports are ever going to get cleaned up that's what it's going to take, and we still probably won't catch all cheaters.