Using Callouts in PvP is worse than bolter, in my opinion. At least when someone is using bolter, if they arent aware they are still super bad. Using a tool to make you aware of everything going on, is about the highest level of cheating on PvP.

It's funny because it calls some buffs before the animation or buff gets applied, I don't know how someone would call that fair. This is like putting LeBron in a college basketball game.