While drawing Fortnite porn is kinda' weird and gross, I would consider this to be harassment. Following someone around, surrounding them (surrounding them with your gang of friends and drowning out any ability for him to make an argument for himself with mic spam and numbers) and then telling him to leave the server is pretty obviously harassment; considering this will probably continue for multiple days, if not a week or more after today.
Yes, Fortnite porn is fucked, but he doesn't deserve to be followed around and made fun of. It's fine to make some jokes, but don't follow people around and continuously spread unnecessary hate and instead find something else to do.
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