It is a very logical thought.

this is conjecture...

from the 4% angle

... if is not pedo related - it is not an environment that is easily controlled.
Not much room for manipulation of their peers. (outside of pupils)

If we are talking the 4% with pedo tendencies, I would say other places are more 'interesting' to them..
One quarter of of these 4 % - have no fear gene.

(the hunt is the thrill - it is not an organic predator prey dynamics as we understand it - that is a natural order - these people are anything but living the 'natural order,' if you see what I mean. The game _is the point.)