The reasons given are valid. "If I wanted to stay in contact with classmates, I would keep in touch all the time and not just show up with a bunch of people I don't care about." "I don't need to relive high school." "Reunions are for people who need to be in a popularity contest." "I've moved on!"
What I am more interested in are the reasons people DO drive 500 miles to attend an event with a few hundred people they don't really know. We in attendance obviously don't go around explaining why we are there. As I was driving across North Dakota and Minnesota, I was asking myself why I had gone. Why do I feel a connection with hundreds of people who just happened to live in the same town I did during my teenage years? Am I trying to relive my past? How much time and effort is reasonable to try to maintain friendships though Facebook and get-togethers?
Maybe there are just too many miles from there to here to ponder life's why's and what-if's!