Ask.Mefi: What's the proper approach to photographing people in public? ⇒
27 February 2008, early evening
There are really only two ways to go: be totally invisible, or completely obvious, anything in between and you end up looking really creepy. (The links in this comment are great.)
This is a post from my link log: If you click the title of this post you will be taken the web page I am discussing.