I do a bit, sometimes my little maxped bag gets mistaken for a camera bag, sometimes people give a little, "wow, you look prepared for anything!" I usually give a smile and continue on. If I'm in full work gear I just look similar to any of the folks who work at the zoo, or similar. lots of brown hiking clothes. Out and about is generally pretty casual, but I don't go out of my way to fit in. What I do is to look like someone who has little worth taking, and isn't worth a fight. I'm a little dude, so I'm not big on anyone's mad-dog radar. But its also an avoidance thing. I don't go places where that is a concern very often, and when I do, its head up and eyes open time. I've been mistaken for a cop, I guess its all in how you move. the difference between being present, and being aggressive. Of course I'd loose a fight to a wet paper bag if it came to blows, so I gotta look like I have more bite than I do. Easy when I had the mohawk, easy now with the shaved head (gotta love early baldness). Of course I've also been mistaken for homeless, and as a courier, so maybe people are just not good at guessing? That said, I do go out of my way to keep my gear looking civil. I like my bag because it looks camera bag-ish. I don't carry knives on the outside of packs, and I try to limit the level of matching gear. The more hodgy-podgy it looks, the more it looks utility over tactical. The stuff I have hanging off my bag are things like keys, a compass, mini-towel. Stuff that is easily identified. I think we feel we are watched more than we are, but its very much an environment sort of thing. There are places I just do not fit in, and in those places I do my best to disappear, or get out. Don't want to be a target because some numb-nuts mistakes you for an easy tourist mark.