Yeah, excluding toxic individuals is very important goal. That's why it's also very important to seriously think about the mechanism which is used for kicking out toxic people.

The mechanism might be too weak and not be able to help the community. Or it might be too strong and end up excluding many good individuals.

I'm in favor of trying different mechanisms in practice and watching if they work as intended. If not, then they must be adjusted before the toxicity spreads too widely.