Why the owner of the room can not give ban permanently ? I think that this would be good option. When person who was banned delete cookies can come back on the room.
My suggestion are 2 new options for owners - “kick” (person can come back to room without any problems), “ban” (person can’t come back to room).

Thanks for your input. I agree that the banning function needs further improvement. It is however a bit tricky to clearly identify a user in a system that does not require registration but i’ll think of options on how to make the system better…

Can you add a unban function ?

Yepp, that is also on the todo list…