[pyre]

This logic falls down:

1. If the police catch every child sex trafficker selling on Backpage, then there won't be anymore posting to Backpage. The ones left will either get more savvy, or already more savvy and weren't using Backpage.

2. If they don't catch a large enough percentage of the traffickers, then the ease and reach/audience that Backpage provides will still entice people to use it.

Sure, you can use it while it exists (to find and catch traffickers), but it either won't exist for long, or continuing to operate will still allow some amount of trafficking to successfully happen.

[qb45]

Backpage is not only child traffickers though, I've heard that it's used by lots of American prostitutes too (prostitution being illegal in the US, though).

Which is why you have comments like https://news.ycombinator.com/item?id=14695515#14696098

[MichaelBurge]

I imagine child sex traffickers aren't very smart people. There will be some organized crime that avoids it, but also some lazy opportunistic perverts that are really really stupid.

Remember, the Dunning-Kruger effect was originally about a guy who robbed a bank without a mask in broad daylight that had cameras. Police showed up at his house the next day and arrested him.