It's hard to find a good core of adults. I've been in 3 clans. A group of us left one clan because a dude and his douche brother.
Actually, a group of about 8 left and formed their own clan. We tried to stick it out, but finally had enough and 15 of us formed our own.
We try to recruit but it seems most are just hoppers or immature.
Clearly it's a game, but if you are going to invest time to play, why not actually try.
We have a fun atmosphere with mostly adults. The only real "kids" we have are the kids of our adults.