These two users just only today are abusing the server with spam messages.
I should say that it's the same user using probably two accounts.
Should be banned.
The right thing is to use the ignore function in the chat. It needs a second to ignore for 1 year and you don't even need a mod for that. It's just brilliant easy.
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But the right thing is to ban, because the person will think a lot before doing something against the rules.