In the 1700's he would have been allowed to abuse them himself. WTF it has to do with anything that happens now is a little beyond me and just like your point totally irrelevant.
That link posted it firstly FAR too long to read and secondly I would bet is written by somebody who has not had to live with and witness the effects that CP can have on children both at the time and when they reach adult hood. WTF though it's a pointless argument. Amybody arguing that it's OK to view CP because you don't harm the kids is as sick as the people viewing it.