Its never a good idea to take punitive action against one person for another persons actions. I responsible for my own actions, but how can I be held accountable for another's?
The potential for abuse here is huge, as most players cannot monitor actions, and various chats at the same time. A clan owner and admin can try to monitor, but cannot ever completely control what members do, and if a player wanted to, could use alts or friends within or outside of the clan to instantly make the next ad silencable.
Great, you say? Yay, no more ads... But the rancor / ee war and t8 eb craze has killed many clans to the point where they must post ads to survive.
Furthermore, lets talk about the quality of the wc without ads that everyone seeks... There are only so many "yo mama" and "chuck norris" jokes one can stand. After that you are left with rougue players trying to offend and/ or get silenced, and the dating crowd. So can i expect the 'wanna rp' tools to get silenced as well? how about the 'buy my allies' or 'volly me' folks?
So you hate clan ads. Guess what is coming when this rule goes active. That's right... ads in your inbox. Get ready to unfollow everyone, cause those ads are coming in pm... and when you are trying to get your date and sell your ally in the new and improved wc, lurkers will be waiting to wall you their ads, thus interrupting your enjoyment of that great 'yo mamma' joke.
Finally, i would suggest a few fixes... First I think with very few exceptions, that ally chat is the most underutilized feature in kaw, and thus could be used as 'ad chat'. Second, if there were a better way to search for the eb that you were looking for, maybe the current amount of ads wouldn't be necessary.