Membership for clans?

I had a really great idea. There are lots of times when leaders want to kick out members who are good, donate, but are just really annoying, so would if when you join an invite only clan, you can get a couple days or something to check it out, and then when your ready, you can apply for membership. Then a clan leader can give you a "contract", saying you can be in the clan for, i dont know, let's say 4 seasons, then after that, you would have to reapply, and the leaders can choose whether or not they want you back. Also, in your "contract" there can be things like "must level up at least once in 2 seasons", or "donate at least 200 troops in a season. Then, if you dont meet these requirements, you can be kicked, or banned temporarily, or something else. This is just a basic idea, so post new ideas or corrections to this.

Or you could just kick them. If they don't like your clan, they can leave. If you don't like them, kick them. But a way punish players are a must though. :)