+1
It's the reality of life, especially since urban streets, unless they are roped off for a shoot, are busy places where, as a pedestrian, you're looking for something that catches your eye. Somebody pointing a camera in your direction, is bound to attract a glance. I've been close to plenty of city street shoots, and, for the record, the movie/TV mafia-police have not yet acquired the authority and jurisdiction to tell people where they are allowed to point their eyes.
I know some people involved in the "shooting" world and I've been told that you lose about half of your footage right from the start due to people that point, stare or wave. That's why scenes are generally shot several times with the bad footage left on the floor. Crews have to put up with this if they want the scene to look believable, with real people on a real street instead of actors and extras on a closed set.
I've walked the streets of New York quite a bit and you're always looking for something that catches your attention. A crew with cameras and lights is definitely more interesting than the arrival of a transit bus. You're going to look, to see what the scene is, whether there are celebrities, etc.