Paul Luscher
Well-known
I'll go with jsrockit here. This is a combination of ignorance with what I call the "Barney Fife" mentality.
I agree with Mr. Hicks that you put yourself on less stable ground by going in the establishment only for a light reading. Even so, as long as you were taking the photo from public property, you would be within you rights in any jurisdiction I am familiar with in the USA.
But I am curious. What kind of place and neighborhood were you in? A security guard inside the eating establishment? Were you on a public street or perhaps in a park or strip mall of some sort?
Exercising one's civil rights is similar to excercising one's muscles. If you don't excercise them, they tend to weaken.
Ergo, keep shooting, even after you've gotten all your pictures.
I mentioned the print-out because, sadly, many people in charge of protecting law and order do not actually know the laws they are keeping which results in a lack of order (Cops). This print-out has kept a few of my friends from getting into escalated arguments and having police hold them while they call their superiors for clarification on the law. I am speaking from the experience of friends, while critics of this tactic merely speculate. One of these people is a very well respected photojournalist whom a few of you probably have taken workshops with.
To each, their own I guess...
(edit: sorry for the Ad Verecundiam argument, but I thought it was better to include it than to not)
Exercising one's civil rights is similar to excercising one's muscles. If you don't excercise them, they tend to weaken.
Ergo, keep shooting, even after you've gotten all your pictures.