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.
Look at the accounts if these accounts are spamming 2-4weeks of these accounts arent even logged in sorry to say i am not active anymore because i do trade full time as of the moment as the market seems to be very profitable with its current movements.You can enjoy tagging those accounts if you wanted to including the higher ranks,but think twice if i would spam with these accounts why would create these accounts and not use these at all? simply because i wont,spamming abuse look at the post history and dates tell me when i did use these accounts to spam.
I am not ang english speaker sad to say but atleast i can communicate using the basics compare to others that has no grammar nor spelling at all.