- Warn
- Suspend
- Ban
That’s how you deal with misbehaving members.
The warning can be in public, friendly at first, but a strong moderator note at the end. Then you move to a warning PM.
If people don’t listen, chuck them out for a few days, that usually gets their attention.
If afterwards they continue to waste your time / devalue your community, you just ban them.
Or as said above, consider lowering the limit if that’s better for your community 