Scum Read

Typically used online

Reading how a person types and comparing it to how someone else types, which could help add suspicion that those two are actually the same person. This tactic is defined and also used in the game "Town of Salem", where people read the way a Death Note is typed compared to how town members type, which can help add suspicion on to them as the murderer.

A town member on a game of Town of Salem had the same perfect grammar as was featured in some Death Notes. Turns out my scum reading worked; they were the Mafioso!