While I do prefer to not be sitting just inside the door with my back to it, I otherwise place no particular importance to where I might be sitting in a restaurant. There's always the possibility of "X". I simply choose to ignore a lot of those possibilities. So does everyone else. We all ignore all kinds of things that are more likely to kill us than is a choice of seating in a restaurant, they're just things that don't particularly interest us, so we ignore them.
Still happily answering to the call-sign Peetza.
The problem, as you so eloquently put it, is choice.
He is no fool who gives what he can not keep to gain what he can not lose.
-Jim Eliott, paraphrasing Philip Henry.