I mean, come on here... who cares if some
30-year-old man is fapping off to shoujo anime? 
Do you SERIOUSLY believe, or worse yet contend,
that this is somehow going to cause him to rush
out and violate a teenager?  Pshaw.

Despite what the religious right-wing nutballs
might tell you, there is no conclusive proof that
fantasizing about something causes a normal person
to act it out in real life.  In fact, there is
copious research which indicates exactly the
opposite -- that fantasy of any sort is a good
outlet for the stresses of real life.

Now I for one play a lot of videogames.  Many of
them are violent, and some of them are egregiously
so.  Does that mean I spend my weekends hunting
hikers, carjacking commuters, or sniping from the
city rooftops?  Of course not.  Does it mean I
occasionally entertain happy thoughts of
rocket-propelled grenades while sitting in heavy
traffic?  Indeed it does.  *grin*  And that gives
me a good laugh, and makes the situation less
annoying.

But if you're seriously worrying about whether
people can distinguish fantasy from reality, I
highly recommend that you get some professional
counseling -- strong doubts like that might
indicate that you're the one having trouble
coping, and it's best to talk to somebody about
that and get it under control quickly.

Just my two-yen's worth, with a few extra quid for
the shrink fees...