Well seeing as I'm vanilla it's time to hypothesise and muse a little.
People with under 10 posts
1. Bazzi (5) - cjrankin, town. Post condition of calm your tits at least once each day phase or something similar. Could be made up, but I doubt it.
2. SGLC (4) - meh, nothing much, voted mickyj but so did a lot of us.
3. Misanthrope (4) - fairly inactive for obvious reasons. I'm thinking town just because I buy into the giving him a more vanilla role (which still could be mafia though) because of his known inactivity.
7. butchmcdick (6) - hasn't offered much to analyse, mostly off-topic posts, could be town could be mafia.
16. Jason Maher (6) - Not a whole lot here either, fairly well expected to be inactive these days. Claims role is shit. Claims this when mafia Don. Who knows.
19. afinalsin666 (1) - made 1 post to vote for mickyj. Hard to read into a lynch when the catalyst is an investigation, even if it's a flimsy one. Like JM, typically inactive lately.
20. Bazal (7) - similar vein to butchmcdick imo.
21. Pugzley (4) - see JM & afs and an upcoming Smiley mention too. meh, who knows.
23. Smiley (4) - pretty confident he is town. I think he called the one-off mass-roleblock based on him asking whether mafia have two kills for Night 2.
24. Beeker (0) - has not posted once. Either vanilla townie or mafia, highly doubt he has a power role he needs to send in by himself.
Conclusion: I got nothin'. Very rarely in any games are mafia made up of only active players or only inactive players. It is usually a mix.
So from all that, my number one choice of inactives would be...
Beeker - 0 posts, not adding anything for town, unlikely to have a power role so if he isn't mafia a valuable town role hasn't gone to waste