How do you get someone to understand your words as they are, denotatively -- so that they do not overly-emphasize (non-existent) hidden connotations?
Of course, you should choose your words carefully, taking into account how they may be (mis)interpreted, but you can't always tie yourself into knots forestalling every possible guess about what intentions "really" are.
Become more status conscious. You are most likely inadvertently saying things that sound like status moves, which prompts others to not take what you say at face value. I haven't figured out how to fix this completely, but I have gotten better at noticing it and sometimes preempting it.
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.