Metagaming

[Shanba]

You've essentially said who you're talking about, so not naming names is pretty useless anyway. XD.

The thing is, no matter how questionable any given player's playstyle is, they are still at the very least another warm body for the town. Also, it's entirely possible that said player might be a power role and, even played badly, a power role is useful for the town. And you don't really want to waste a lynch that way.

Also, I fully believe that no player plays exactly identical as town or as scum and it is therefore always possible to distinguish a player, so long as they are active's, alignment.