waitress power

This is how I was seated at a restaurant recently. To my back is the door that connects the kitchen and cash register area, the primary entry and exit point for waitresses. Anyone trying to catch their attention would have an easier job if seated facing the opposite way. When questioned, my waitress claimed it was an unconscious decision to place me there, but I wonder now whether waitresses use the topology of a space to constrain their interactions with customers - what if I was a known troublemaker?