A similar bug is when multiple people decide to stand and have a conversation directly in front of the seat you're in. Like the example patrick425 cites, they aren't truly out-of-place since the game hasn't begun, but your choices are to either move temporarily or be forced to observe the conversation. Since this has happened to us a few times this season, I wonder if section 217 is the key. This reminds me of an odd bus ride I took in Madison once. Rider A had a window seat. I, Rider B, took the seat adjacent to hers. Rider C boarded later and sat across the aisle from me. Riders A and C are friends and apparently hadn't seen each other in some time, as they launched into an animated conversation that I was physically in the middle of, but otherwise not part of. The high point for me was when Rider A asked to see Rider C's new wedding ring, which she had to kind of thrust in my face to get it close enough for Rider A to see - with not even so much as an "excuse me." So I'm going to posit that many people have little to no awareness of their surroundings at all.