That "sounds" like a good answer, however.... the problem I have with it is if you are evil then my lack of posting serves as a good "excuse" for you to add your vote to DD's vote against me knowing full well that the town might follow along without questioning your motives. The two of you (if both evil) might then be able to get me institutionalized..... saving you from having to use up a hit to take me out.... also enabling you to target someone else who might foil your scummy plans. A twofer kind of deal like that is appealing for the scum whenever I'm innocent.
The other faulty part of your logic here is the idea that you'd seek out evil from among the low posters in a game that's incredibly LOW in posting across the board. Out of all the people not posting much (me included) only 4 of the players in this game are scum. Low posting is a lousy discriminator to rely on when... (1) most everyone in the game is being quiet, (2) the players not posting a whole lot thus far also includes innocents and townie PRs we wouldn't want to lose by mistake, and (3) that part you've just acknowledged that there really isn't a reliable correlation between my post count and my alignment.