Threads being derailed is the minimum. And yes, your echo chamber sterilized environment would become yes people repeating the same thing. A crowd opinion like the days of colonizing where strict religious zealots decide what is copy-pasted, what is sourceless, and what is hallucinated, while those lemmings seeking attention would join in to fit in. You keep re-using those words, so they mean something to you.
You seriously can't believe these cult ideas are harmless, and that you wouldn't end up beating down and chasing off everything YOU and YOUR GROUPIES then think is hallucinated nonsense or otherwise trash to you and your own beliefs and practices.
What that group then is FOR or AGAINST would be the only thing left, which is the same thing that drove the Inquisition for 600 years.
That is the part that seriously bothers me, your intent is obvious. You seriously believe bashing others as a group, and controlling their content to make it something you want or like, is such a good thing. It smells like a reincarnation of someone who is trying to bring back some seriously bad history. Trying to defend it or soften it doesn't make it something positive. Eugenics was considered a great idea by the wealthy and the intelligent in my youth, it looked great to them, and was even protected with fake science, but you may not know any of the actual history behind how things like that start. They usually start with suggestions like yours... too late to take that back. You are now known for this...