Perhaps a better filtering mechanism when searching groups would be a better solution -- with the ability to exclude the groups you mention from your search results it shouldn't matter to you whether they're there or not.
Yeah. I think it would be really nice if you could search for teams with certain stats too. Recently I was searching through the pages and pages of groups and teams to find one that was about the same size as one that I'm adminning so that we could play. It was a pain in the butt. With a better search feature, it wouldn't be.
The real issue is not managing one member groups but if it is active or not.
Some members keep creating groups & and not bothered to manage well.For Example, a member created the team "Team India" & started participating in World League. Around 500 members joined the team.
But the team owner was not ready to accept other players as Super Admins or Admins. After few months he disappeared from the site. The team was keep getting members as the name represents a country.
The members had to write to the staff for many times. After many arguments, the staff selected few members as Admins recently and the team is active again.
If you search for groups, you can find many groups where the Admins have not logged in for months.
I was only suggesting the staff to find the groups with no activity for a period of time and remove them after posting the notice in the group.