Since you seem to be incapable of seeing this for yourself, I'll jump in.
What he was saying is, that without knowing more, that is what may have happened here.
Go read his post again, Einstein, before you jump in over your head.
What he said was that if Society had the guts and wanted pedos dead they should pass the death sentence for them. So, using his logic and ignoring the fact that murderers and pedos serving life sentences aren't in county jails, the 18 year old would either be on death row with the other pedos or he wouldn't be a pedo and in danger of being beaten to death by a vigilante prisoner. He'd just be another prisoner. Get it?