It's certainly a small world.
I fly at a public field. We deal with specators all the time--it just goes with the territory. I've yet to have one sneak up on me, but I don't imagine it would bother me too much. There seem to be two types when it comes to RC: those who really concentrate on the flying, and those of us who don't mind conversation and distractions.
It's tough to fault a state trooper for doing what he did. It's kind of the nature of the job in a way. All that said, let's try to keep our tempers in check in the thread here.