That sucks and you're an idiot if you use it.
No spy in their right mind would back stab you if you have that on.
They'd just ambassador you to the head.
cigarettebassador.
Spies are supposed to mainly worry about Engineers. Inexperienced spies only go for snipers for easy kills. On top of that, I don't sit on the battlements like the other cigarettes, I cover the entire base, so I'm under watch from my teammates.
And yes, the unlocks are stupid, but I'd like to personally choke anyone who says TF2 is an RPG. Almost as bad bandwaggoning as calling Gabe Newell Fat.