I dunno what part of California you're from but I've seen a decent amount of audiophiles around here. Myself included, but I live in a pretty ghetto area so walking around with a several hundred dollar set up isn't something I'd feel comfortable doing. As much as I'd like to, the closest I've gotten is walking around with a pair of clear shure se215's. To the general public, they look like hearing aids, but to the people I've shared them with, they sound great. ^^
I'm in San Diego. People around here are not worried about getting their headphones stolen...otherwise they would not be walking around with expensive Beats on their heads. They just don't know about what good sound is. If they do, they care more about what is fashionable or cool instead. Funny thing is that most of the people I saw in Europe had the headphones on their ears - I assume that they were listening to music and that they would put the headphones away when they were done. In San Diego about half the people I see with beats have them hung around their necks. Does that mean that they don't have somewhere they can put their headphones in after they are done listening, or does it mean they are using them as some sort of high-tech jewelry?