Then someone with a bunch of bots spams this board with "opposing ideas," being obtuse in their arguments to defend it, and it drives people away.

Censoring people who come here specifically with the intent to harm, or AI's, etc. is a different thing entirely.

That's effectively impossible to determine in most cases. One of the most effective ways of arguing with intent to harm is to simply ignore arguments against yours. Nothing about your own posts will change, so it can't be definitively detected by any method.

Edit: Think of it this way: We're trying to build a community here for people who are feeling very stressed about the current situation. So we build it with materials that are suitable to that purpose. Similarly, you wouldn't build a house with rifles, even though rifles are indeed very important for specific circumstances. You build a house with plywood and/or bricks because those are the materials which are suitable to producing the result that you're after.

Then someone with a bunch of bots spams this board with "opposing ideas," being obtuse in their arguments to defend it, and it drives people away.

Censoring people who come here specifically with the intent to harm, or AI's, etc. is a different thing entirely.

That's effectively impossible to determine in most cases. One of the most effective ways of arguing with intent to harm is to simply ignore arguments against yours. Nothing about your own posts will change, so it can't be definitively detected by any method.