looking don't mind, I'm usually pretty oblivious to stuff so I don't notice a whole lot when my boobs show alittle. staring at some one usually make them feel overly self consious don't have to be something perticular. its not that bad as long as you don't talk to them, name them for her, or try touching. that's were I draw the line.
I've never been yelled at for looking, but then again, I don't *stare* because that's pretty obnoxious. I think the more invasive/rude you are, the more likely it is that you're going to piss someone off, regardless of what it's about.