I am purchasing 11 tickets to a Wausau Woodchucks baseball game in mid-July. I really wanted front row seats behind home plate. Notice how two groups of two people have plopped themselves there. They have left space for more people to comfortably join that row, which is totally fine. Now, look at the fourth row. See that little seat between two groups of tickets? Those are my kind of people. See, if you have the technology to buy tickets beforehand and know where you will be sitting, why the heck would you ever buy a ticket right next to somebody if you know there are many options for you to choose from? I am always disappointed in humanity when I get to the theatre for a movie, and some moron comes in and sits right next to me in a mostly-empty theatre. Dingleberries.
Maybe this isn't an irritation to you, but OH MY, does it bug me!