Single file line please

So the wife and went to enjoy the new Transformers movie on July 4th and was extremely pleased with the movie.  I was however not to pleased with the behavior of people at the theater.  As children growing up through HS, grades K-12 we are taught constantly to form single file lines.  Single file line to the cafeteria, to the bathroom, so on so forth.  Seems like all those years of conditioning are just thrown out the window as people become adults.  Standing in line for the movie there was no form of single file line whatsoever behind or in front of the wife and I.  People just spread out, butt in line, push, shove, whatever they can do to jockey for a better position in a line.

We had waited in line for about 15 minutes and our position was around 8th in line.  This one joker from the rear of the line comes up and starts talking to a father and son in front of us and just helps himself into a position right in front of us in line.  I made several LOUD comments to my wife about the rudeness of people butting in line in front of those that have actually been standing here waiting.  Seeing as how I didn't want to be overtly rude and just tap the guy on the shoulder and ask him to return to his original spot, I just let it slide.  Ever fiber of me wanted to ask this jerk to move his butt back, but I refrained for my wife's sake and the sake of causing a big scene.

Honestly, how hard is it to stand in line single file?