As dumb as the sicko's are, I can't imagine too many of them taking that type of a risk. Authorities pretty much monitor the hell out of them with warantless/consentless searches and the like - you don't have too many rights at this level. One slip up and your probation has just been revoked and its all aboard the Pedo Express to prison. And they all know how THAT'S going to work out for them.
This reminds me of a story i will share about a certain piece of shit in a little while...