Anecdote: I'm a college student, and around half the people I see on campus (including me) wear these around while talking to their friends. It's kind of cool but also kind of a problem.
Also anecdote, but I wear mine frequently when commuting or listening to a bit of background music at work and because there is no cord or significant weight I will often forget that I have them in. I once wore them in to work from my commute and did not notice that they were in until I went to put on a hat when going out to lunch and brushed one out of an ear.
On the other side: my son is a high school student and they have a rule to remove the headphone(s) if they are talking, talking in headphones is a bad manners for them.
