Not all of them swivel.Why don't you just move yourself and/or the pin machine? Aren't most of them tilt n swivellable? Provided they're not actually leaning over you I don't see why you think you should expect others to move for your sake.
And I don't see why someone would have any reason to stand right next to me when I'm using it seeing as how their shopping is still on the belt, and not at the other side of the till where the pin machine is.