May be if you could list the accounts that cheated on a bounty, that could be a good basis to have the accounts tagged.
If the OP can prove that all the accounts have connections and cheat on the campaign, then I suggest he post them here:
Known Alts of any-one - A User Generated List Mk IV (2022 Q2) [MODERATED], if it is valid then the tag is appropriate for them.
I don't have a problem if anyone expects merits from others. But, I guess meriting alts is unethical.
It's true, it's unethical. You probably don't have to worry about that because for obvious reasons you can ignore the user and blacklist them. I'm sure if they abuse the merit for the 4 accounts then people will no longer get the posts they deserve.