I know in VA the technically correct thing to do is to stop at a stop sign. You are considered a motor vehicle in the state of VA and technically you are supposed to obey the traffic laws. I have known some guys get tickets/violations from cops who are just trying to be jerks but it can hold up in court (technically). I dont stop at all of them, but i also make sure i know where i am riding before i decide not to stop at them. A lot of stop signs in residential areas really only require slowing down, but just my .02 cents