How about feature to banned certain player from requesting invite or getting inside clan.

Theres a bunch of player who decide its good idea to get into a clan and become nuisance like giving ♥♥♥♥ troops on purpose, flaming and being rude, sleep through wars even when they greenlight themselves.

after my leader kick them i told the leader to never let them in again, but its hard to keep track of them all. so i think a banned list is a good idea. also add ability to noted the reason why they are banned.