The problem I run across is this: non-nude has been (and will continue to be) a kiddie porn term. It is used mostly to describe underage model sites where the girl poses provocatively but never actually gets naked. They are baby step sites for pedophiles.
For the most part, visiting those sites tends to put you about 1 click away from actual KP. Most of them play top lists and such, and they get mixed in with harder KP sites that are really sick.
I had this debate on another board with a program operator (and good friend of mine) who launched a series of "non nude tours" for his solo girl amateur sites. I just find it is an objectionable way to pander down to KP keywords looking for traffic.
Might as well allow "******" and "young teens" back into the game too...
Alex