I've only ever had the 'oi, you can't take that here!' treatment the oncve and that was in the Broadgate development right by Liverpool Street station in London. Simply because the whole lot is private property and the security at that place seem to be particularly zealous. I've taken a fair few images down at Canary Wharf, mainly in the area between the tube station and Heron Quays DLR and never had any hassle at all, even though as far as I know, that is all private property as well. Guess I have to put that one down to luck more than anything else! Any other restrictions in what I take are simply me being respectful of other people's privacy, and to a certain extent, being aware of the suspicious social climate we live in. For instance, I never go down to Leigh-on-Sea with the camera, on my own, on a hot summer day when the crowds are out, simply because there is an assumption held by some people that a lone middle aged male with a camera by a beach full of kids is up to no good. A sad sign of the times but I'd rather avoid any unwanted hassle. However, when I'm out with the other half in such a situation, having a camera never seems to be a problem. It's not that I don't do the occasional candid - it's just that I'm careful about the who, when and where of it.