From the sidebar of that comm:
Rules
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Be respectful
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No bigotry
...and in charges an account from dbzer0 that has a username which screams "I'm definitely not the alt account of a user that has been going by variations of this name for about two decades, and I'm completely unaffiliated with the admins of dbzer0!!" to use psychiatric disability as a bludgeon to attack someone which, if that user had drafted the dbzer0 code of conduct, they would know that:
"degrading, disrespecting, or insulting another person or group of people because of their... disability"
is not permitted.
(Except if you're big mad at the tankies for existing, then it's cool - you get a free pass!)