The newest episode of Lost featured the character Claire (Emile de Ravin) piercing someone with a piercing gun.

Unfortunately this episode reinforced to the million of viewers that getting your ears pierced with a gun is okay. It is not advised to get your ears pierced with a gun. Sterility is a factor at risk when getting your ears pierced this way, as well as the questionable skill of the so-called piercer using this method.