That is about as intelligent as those who say "Well, if your not doing anything wrong, then you would have nothing to worry about" when discussing civil rights violations and rampant ignoring of the 4th amendment by the Imperial Federal Government.
Hey, if your not harboring any illegal substances or items then surely you wouldnt mind recinding the 4th amendment. Nor the 5th should you be asked to testify. Hey, if you didnt do anything wrong, no problem.
You statement is really like the whole "if you aren't doing anything wrong..." argument for no privacy, etc.
I know pederasty is nasty and properly illegal, but this law enforcement technique does seem to border on entrapment.