The nature of the fediverse means bad actors could run rampant, jumping instances and usernames to turn the place into a shitshow.

The only reason it isnt happening already is that we arent worth the trouble.

The only way to avoid it once a certain size is reached is a paid moderation team with a mission statement to stamp that shit out, which means a budget is needed which means backers/investors/advertising... and tou get where this is going.