Social Blunder #25
Bluetooth wireless headsets are not a fashion accessory. The only times it is acceptable to be wearing and/or using one of these things is if you are driving a car or doing Mission Impossible-style acrobatics while talking to someone on the phone (and the odds are 6 billion to one against you being Tom Cruise). It not only makes you look like a grade A dork but also makes it impossible to know if you're talking to me, to someone on the phone, or to yourself.
Just don't do it.