You fail to see the point that those are inactive and the 18th is technically. The application was also posted by chantakey. So what if caribou was still in the 18th, then played for both teams and may screw the 8th or 63e over because carribou has a history of doing things like that. Why set up bad situations when we can prevent them before they happen?
Having all these exceptions and letting things slide is what made this league so shitty in the first place.
And Alex, your reg was always cheating wherever you could. I have caught you far too many times with breaking the rules.
Here's why your rule is not needed:
1. I can go double reg without having to be in their steam group
2. I can go double reg, join their group, and just make my profile private
The rule can be bypassed by anyone trying to do so maliciously, meanwhile the only people you'll catch are just innocent reg players. You know how we actually find out who is double regging? By finding them in their linebattles. Groups don't mean anything.