I want to see what happens next, ban or red.
There's no rule to ban accounts due to having multiple account and cheating with these. Forum member can only tag them with appropriate texts so that bounty managers can kick them out.
It can happen if one of the connected accounts is found to have been autobanned already. Like OP has already pointed out "archived" /autobanned accounts but they are connected to some accounts that are still active. Which means they are evading ban and deserve to be banned too.