Well, none that they've caught and prosecuted, anyway, I suppose.
My neighborhood is normally quite "safe" but recently (the last year or so) we've even had a spate of mojos from their car windows trying to get little kids to get some kid to go with them. At least one time the child was able to report the license plate to the cops. In fact, roughly a year or so ago, our own youngest one was walking with my wife and for some reason, she went ahead and he fell behind, but when he caught up, he said some guy in a car called to him.
I suppose it's the "safe" and such type neighborhoods that parents and kids are more at ease in and so the mojos might favor cruising these. Nothing substitutes for alertness and vigilance, not even up to date perv (perp?) info sites.