Admins indeed can deal with these users, by deleting their content from their instances, and banning them from the site, if they are homed on that specific instance they get banned everywhere when that happens. So it can be dealt with but it takes work from our admins, and since these are communities run by real people and not monolithic corporations, we can speak up and make a difference. Reach out to these admins who are real people.
My guess is he considers himself an ally and thinks A is for ally lol