Forum account sharing is hardly the same as game sharing, since one has zero impact in game and can happen due to simple mistakes, hence why Kesh was unbanned.
As for the next statement of yours, I've personally stamped out a single incident of a member trying to multi-account before it even happened a year and a half ago (perhaps two), and I think we've only had to do that just one other time (roughly two years ago). I might be forgetting one other incident, but everytime we have always nipped it in the bud the instant Leadership found out about it.
There is no plausible way anyone can run a clan and not find out if he has a multi-accounter inside it for long...
You see, The Fallen are not as incredibly stupid as a lot of the community, and seem to understand this basic concept: Nobody knows what tool cmp uses to catch multi-accounters, but it works, so you will get caught... So we don't do it. It really is that simple, hence why we've never been mass-banned for it.
Multi-accounting and thinking you won't get caught is like installing autoblock and thinking you won't get caught. It is just pure stupidity. I still remember the sour taste I had in my mouth when a Fallen showed up on one of the autoblocker waves way long ago, but we have yet to have that happen again for anything else.
Nobody multi accounts in Fallen, and I'd love for anyone to prove otherwise, but please do share your theory on why we do it unless it is typical "I don't like Fallen so I bet they are dirty cheaters."
Anyone who thinks they can get away with multi-accounting or autoblocking is a delusional fool.