You'll all say that this could be an abuse of the uniform, but I tend to be the opposite when I work in my bar. We often have trouble when we glass collect because people won't get out of the way, even after you've asked nicely and then shouted. It sounds nasty, but when there's no glasses on the bar and you're being yelled at because you can't serve people, you start to get more 'proactive' when glass collecting. In my bar uniform I have no problem in pushing people out of my way, gently knocking them with a tray of glasses, or conveniently spilling beer on their feet. It's harsh but it works. In my uniform I never get a backlash either. Take the uniform from the barmaid and I get ignored even more when I glass collect - yet I wouldn't dare be 'proactive' without the protection of the workplace! I think that makes sense.