If everyone were a little more aware of their surroundings and willing to get involved and take some responsibility for their own safety then maybe we would not feel the need to give up more and more of our rights in the name of safety.
Call me crazy, but if I had strangers questioning my actions all day long I'd consider that "giving up more of my rights." It doesn't have to be a government that takes away your privacy.
Case in point, the OP eventually found out the dude had a friend there, watching his bag. So not only is it not a enough to get a friend to watch my stuff, I have to also announce to the whole world that I'm going to the bathroom?