There will always be a new supply of them, but stamping them out helps to keep the amount of disruption down.
I remember one guy who I think is a non-native speaker of English in the Washington DC area (if I am not mistaken) who used to post tons of stuff on Bible chronology and his predictions for the end times. He would comment on what the Watchtower got right (in his opinion), what Harold Camping got right (again, in his opinion) as well as where they were going astray -- and he would fill in with his own LONG commentaries. His posts would go on and on and on and on. And he just kept popping up. I think he was eventually banned. Ah, the memories.