Hmm... good point. What I typed isn't exactly what I usually say, but I do tend to project my personal opinion that sitting quietly side by side is awkward and alien (to me) behavior. I can see how conveying that impression makes it difficult to disengage. And while I do find the silence pretty damn awkward, other people have no obligation to cater to my hang-ups, and its kind of unfair to (unconsciously) manipulate them into that position. So on consideration, I'm retracting my initial post and reconsidering how I approach these conversations.
I usually take an army1987-type approach in this situation, but here's another possible compromise.
Recently I was flying and wanted to ask someone next to me about the novel they were reading. I waited until half an hour before landing to talk to them, to set a limit on the conversation's length — no implicit request they chat with me for the whole flight. When I did talk to them, I (briefly!) acknowledged the interruption, and kept it specific: "Pardon the intrusion, but what do you think of the novel? I've read some of John Lanchester's nonfiction b...
r/Fitness does a weekly "Moronic Monday", a judgment-free thread where people can ask questions that they would ordinarily feel embarrassed for not knowing the answer to. I thought this seemed like a useful thing to have here - after all, the concepts discussed on LessWrong are probably at least a little harder to grasp than those of weightlifting. Plus, I have a few stupid questions of my own, so it doesn't seem unreasonable that other people might as well.