If somebody breaks the rules they can be warned. If somebody breaks the rules again they can be kicked (removed from the channel but they can rejoin immediately) and/or temporarily banned (they can't speak in the channel or rejoin the channel if they leave it). They can be kicked and/or banned without a warning:
if the violation of the rules is severe (for example, multiple strong and deliberate insults);
if they were kicked and/or banned for the same thing multiple times before and the violation of the rules is more than minor.
In extreme cases, when somebody uses the channels for severe trolling and harassing other people they can be banned permanently (denied access to it completely).
Thanks

I didn't find the right solution from the Internet.

References: https://forums.linuxmint.com/viewtopic.php?f=17&t=224270&sid=4bd2b73ba541058561bf65832f59a36c

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