Could it be a good idea to publicly provide a strictly white hat email marketing section? A lot of the information that one learns from double-opt in and 100% compliant methods would be useful in black hat and grey hat contexts, with some small adjustments in some cases. Server setups, conversion optimization and techniques for bringing in subscribers would be useful for everybody, and most importantly, it should offend hardly anyone's sensibilities. Naturally, less orthodox techniques should always be confined to VIP areas.
It could also be strictly regulated in that it is very well understood that moderators and administrators are allowed to modify and delete any posts due to the sensitivity of the subject. Combined with a moderate post count requirement, we could have some pretty awesome discussion while minimizing potential moderation requirements.
This has probably all been considered, but it's just food for thought.