Checkmite
Skepticifimisticalationist
Are they really "cheap to do"?
I figure anyone they capture would probably need at least a few days of interactions in order to convince them/arrange a meeting. Then there would all the wasted time interacting with people who don't try to meet. So they could waste days/weeks of manpower, all in order to arrest a person who probably wouldn't actually have the chance to meet someone anyways.
I'm not sure how that follows. If they made arrangements to meet and carried them through to the point where they actually traveled to the house of someone they thought was a child, to me that seems to establish an intention that outweighs the somewhat arbitrary hope that they "probably" wouldn't have gotten to meet a real child in that manner.
Consider also that pedophiles on the internet don't need to physically meet a child to exploit them, or cause damage. There is a gamut of harmful behavior that can take place during those "few days of interactions" if they're with a real child, even if the person never arranges or even suggests an in-person visit.
