banner balance in effect 
this is how it will always end up when there is no limit or regulations on how many can join a clan.
I think you didnt push your argument enough.
No limit on how many can join a clan is, like you said, an open door to carebearing and gathering numbers just for the sake of numbers. But as you can see in other threads, people still keep a common sense to them, and whenever the game becomes ultimately unplayable because of unbalanced teams, you can bet your ass people will manifest their anger.
If tomorrow, we had one banner that was occupying EU_1 and EU_2, 24/24 7/7 and represented an average of 50% of the server playerbase at all time, I'm pretty sure there would be calls for a change. The analogy isnt hard to decode.
