Want to "go off radar" in an urban environment?

Go out and get a classic "Mechanics Uniform" - You know those Blue/Green/Grey (depending onthe company) work shirt and pants that you used to see everywhere (but are somewhat less common now)

Get them in a nice medium Grey, get your name put over the pocket if you want, and a company name over the other pocket

Grab a tool bag, and one of those metal clipboard that they use to carry work orders, and you have just become totally invisible - First of all, the grey really DOES work as cammo against concrete/rocks (Look at the CSA and German WWII uniforms if you doubt me), plus in 90% of urban/suburban areas, you're "someone who is supposed to be there" - "Oh, I don't know him, but he must be here to fix something"