Some of the pedo basher groups are legit others arent. There was issues with a group called creep catchers in Canada where they were entrapping retarded people and setting them up with sketchy chats where the bait said she was 18 then switched at the last minute to some underage shit.
The whole pedo-busting shtick was needed in the Perverted-Justice era (they were founded in 2002). Back then, parents of teens were mostly Gen-X types whose first encounter with chatrooms was when they were already adults. Chris Hansen and To Catch A Predator made the whole world aware of the problems of predators in chat rooms.
Today? Today's parents of teens are mostly millennials who grew up in the chat-room era. They know, all right, that social media ain't safe for kids. There is no further reason to do busts like this. Many groups, like Dads Against Predators, got their members in deep felonious shit over the stuff they did on camera.
Look, I enjoy seeing a predator fed to a woodchipping machine feet first as much as anyone. That said, I also believe that an ounce of prevention is worth a pound of cure. Our top priority is keeping kids from being hurt, not laying down punishment. Remember, killing the dog will not cure his bite.