He was just a low poster, much like yourself, that had a vote, and it would break a tie. Call it what you want, but its not like anyone else is stepping up to bat this game, plus I've been actively trying to encourage people to talk more. I was already in the towns good graces for the most part, so I felt comfortable enforcing an essentially random execution. Besides, why would a mafia make a move at all? When the town is inactive, there is very little reason for a mafia to promote, and demonstrate activity. Easier to hide in a silent crowd then speak out from it.
Frankly, everyone who voted yesterday has a + bump in my book for actually participating, and everyone who didn't has a mark against them.