Originally Posted by
[M] Clint Eastwood
An inactive doesn't add anything and the Mafia are less likely to off them at night as it gives them an advantage later on. People who are not voting makes the Mafia's votes more powerful (10 players, 3 mafia and 7 towns, 2 towns are not saying anything so, it is really like 3 on 5. After 1 vote and a night kill it is a damn near dead lock at 3 on 3). Or those inactive towns could be Mafia laying low as has been said.
There are 13 players, not 10. So assuming 3 mafia members like you suggested means 10 players who are not mafia. Note the word choice, there may be independant roles like Survivor, Lyncher/Lynchee, Serial Killer or Jester in the game as well.
Also I don't follow your logic. Go for inactives because by not voting they make the mafia votes have more weight. But you say that one inactive might be mafia. If a mafia member is not voting it negates the impact of an inactive pro town role not voting.
##Unvote: Samuel L Jackson
##Vote: Clint Eastwood