Looks like I'm one of the people you are referring to. Like anyone with a healthy dose of curiosity, I'm interested in anything that is, well, interesting. I'm excited to meet people with expertise in various areas and ask them questions. I don't expect to understand their answers in full but in most cases I can still grab part of them. Based on my partial understanding in the first answer I can ask a better question the next time, and after several cycles I can probably learn something valuable (at least in the sense of satisfying my own curiosity).

The point is, if you don't ask questions in areas you are not familiar with, you will never become familiar to these areas. Well, unless you learn everything from books and Wikipedia.

I'm not sure how many people see me as an annoyance, but at least I'm consistent, in that if other people ask me questions in my expertise, I'm happy to try my best and explain.

Oh, and if it's just impossible to reasonably answer my question in a way that makes any sense to me, I expect you to just say it, and I'm happy with this.