I guess what is entrapment? Is it where you are coerced into doing something you wouldn't ordinarily do? Or you wouldn't have committed the crime if the law enforcement agency hadn't have made it easy for you?
In this case, I think everyone knows preying on children is wrong. Someone who wouldn't ordinarily prey on children wont prey on them if the law enforcement agency sets up a sting, IMO.
These guys are driving across town, it's not like Dateline and the police are having the children come to the predator's home to seduce them.
It would have been nice if the ADA would have had the thoughtfulness to blow his brains out before acting on his deviant impulses. Anyone can commit suicide after they've been caught.