edit: actually thinking about it for a bit, there is a good chance there are more not connected via this merit circle. I say have theymos look into his current alts and ban them all if they meet the criteria.
Theymos won't look into cases of merit abuses. He nor cyrus don't look into anything related to ban evasion or even bot abuse etc. Even the people caught farming or copy and pasting on an industrial scale and are ban evading are free to evade on how many other hundreds of accounts they have and they do regularly. Meanwhile staff have to play whack-a-mole with the bots wasting time finding them manually when many of them could likely be found by a simple IP check. Merit abuse isn't a huge issue and probably shouldn't be wasting time at an admin level but the bot spam and ban evasion is. This guy already has a banned account and I'm sure there are many more.
I would not ask him to look into alts because of merit abuse, I would ask him to look into alts because of evidence that one person with many accounts is making many low quality posts. The appearent merit abuse is simply how we know they are likely the same person.
BadBear would often look into alts in connection with banning spammers such as those described in the OP, there are a couple of instances in which he banned spammers minutes after they bought (and paid for) accounts, which certainly should have discouraged spammers from buying accounts.