Man peaking over the wall known as what else?

My best guest would be a peeping tom, but those are the kind that stand outside your window to peep at you in your room, but i believe that man peeping over the wall could be called one as well.

KILROY is the name of the character drawn at the top of a fence so you can see his eyes and fingers from both hands.

its plain and simple a perv what guy in his right mind would do that? sorry stupid question but still hes a perv it disturbing