It is inevitable, all lemmy instances will eventually be taken over by supermods that leverage their power to harass.
This vegan fiasco isn’t even the first time but I guarantee you the admins will leave them to powermod the remaining 107 as they see fit.
Powermods like that don’t usually have only one account, and since they can mod themselves wherever they go, they usually do.
Nuking an account is just changing skins. The admins have the power to track and fix that, but they won’t.