[beatgammit]

As others have mentioned, if you know enough to make a blanklist, you know enough to go after the sites that host it. Better yet, instead of playing whack-a-mole with blocking sites (it's incredibly cheap to get a new IP/domain), go after those who make it (set up a sting and arrest a ton at once).

If a site is in another jurisdiction, you can still distribute a list of sites to ISPs, and ISPs can report suspicious activity to the police (so they can get a warrant for closer monitoring).

If you block it, you just alert people to which sites are more likely to have illegal content, which can encourage them to access it through other means (VPN, Tor, etc). I honestly don't see any real value in it from a practical perspective, and the only real "benefit" is it gives the government an excuse to add other stuff to the list it doesn't like.