One could also argue (without data saying either way) the opposite: that repeated exposure to this sort of thing just serves to desensitise and feel less guilt.
Note: I don't actually think that there's a causal link between violent media and crime: it takes an already marred individual to go out and commit atrocities, which the media are happy to scapegoat. 99.999% of people playing or watching violent games or movies would never even dream of replicating scenarios in real life.
One could also argue that repeated exposure to this sort of thing increases one's likelihood of becoming a professional juggler.
Without actual data, all we have to run on are intuitions, probably-broken metaphors, and guesswork. I don't generally trust any of those to result in a rational decision.
It could very well be that people who are already marred enjoy violent games more and that contributes to the supposed connection between violent games and violence in real life.
Note: I don't actually think that there's a causal link between violent media and crime: it takes an already marred individual to go out and commit atrocities, which the media are happy to scapegoat. 99.999% of people playing or watching violent games or movies would never even dream of replicating scenarios in real life.