yeah, dont think they need (or even want in my opinion) extra special treatment, like they're some type of god or something, just treat them like a friend, or any other user, and if they actually give you a reason to blacklist them, then why not? if a staff member is rude or mean then you have every right to ban them from your art shops or adoption center.

also they shouldnt give you a warning for blacklisting them if its for a good reason!! i dont think they would either.