Recently you only could see blocked sites when surfing for porn or on aibs, because some activists hunted for CP (also drug stores and suicide manuals, though I never really seen these). Now I see blocks regularily on definitely-non-porn sites. Turn on Opera Turbo and it opens.

Tendency here is to quick-block-and-wait, and it is site owner who must prove, not they. "It seems like" is enough.

Btw, judge who blocked p*hub.com "didn't know it is popular".