One of the staff suggested excluding the Bounties (Altcoins) board from activity calculation / post count which I'm totally for.
I concur with that idea.
Seems a bit too heavy handed. As I mentioned, I'd rather the Bounties section simply not contribute to the post count. Doesn't punish the legit users who are there to apply to bounties but doesn't allow the spammers to pad their post count / activity.
Why? It is strict, but very easy to *implement* and enforce. I am even working on moving signature campaign applications, of the campaigns that I manage, off of the forum.