Yeah well the FBI obviously thinks otherwise and from what is being reported today Foley might have IM'd a 16 year old in a sexual manner and under current law, you don't need physical contact to know that is a crime.
Also as far as the 17 year old is concerned last time I checked sending sexually material to interns and people you work with can get you fired without any physical acts involved and given this person holds such a position in the government... as I said before its nothing to yawn about.
Like I said ... a sex scandal without any sex but with some internet chatter. The 18 year old page involved (he 21 now) says it was a prank that got out of hand, that it was him and his friends jerking Foley around. Details are at Drudge