I may have exaggerated a little for effect. Still, I do find it annoying when people, completely out of the blue, intrude on my private thoughts, entirely without provocation or any reason other than, apparently, enjoying the sound of their own voices.
It's worse than that. Some such people apparently think that they are doing a good thing for you by intruding in this manner; that you will appreciate it.
The road to the introvert's hell is paved with the extravert's good intentions.
(Note for the literal-minded: "hell" is also an exaggeration for effect.)
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.