Either if the AT&T prices are becoming too much or you just have a flair for the dramatic, the IGiveUp Bluetooth gun might be for you.

Basically just taking an airsoft handgun, a Bluetooth headset, and a normal iPhone, this guy created a system where when noticing on caller ID a call he didn't want to take, he could answer the it and mercifully end it by holding the gun up to his head and pulling the trigger.

And while it will work with any Bluetooth enabled phone, the catch is the IGiveUp gun is not for sale. However if you are mechanically inclined, he lays out the full 11 part process of how he made it here.