But what's the end result you're trying to achieve? Is it to create one main list ("general"?) to serve as a single point of reference for other campaign managers to use when considering applications? Or do you want maintain 3 separate lists + 'general' and 'Permanently Blacklisted' just as informative additions?
In theory it doesn't matter, you could say that each manager can choose whichever list(s) he prefers (if any), but imo, putting focus on one, main list (by clearly denoting it as 'main' and possibly moving other, supportive lists to 2nd post) will have much stronger effect, especially if you intend to take more managers on-board.
Having a singular list is most certainly going to be more effective. I do trust the judgement of the other two members, and thus their inclusions could also be considered as *my own*. The primary difference at this time is that I can not use their blacklist and add those people into my own list. I can't deny enrollment on Bitmixer, I can only ban after I've discovered that someone is a signature spammer. Therefore, my list is supplementing the others ones (yahoo's and TBA Lutpin's). I think it already has a decent impact as I've seen account traders ask whether accounts are blacklisted by SMAS or not.
The more campaigns are managed by SMAS participants, or use the SMAS blacklist the better the general environment is going to be.