I've asked a few etymology questions: that is, how a character or word came to mean what it means. Most of the time there are excellent answers that are surprising, which is great!
However I've noticed that they also tend to attract a few types of low-quality answers. Some are simply restating the definition of the word or character. Others don't answer the question at all: they might be commenting about the Chinese language in general, how etymology is very mysterious etc. Some answers are poorly sourced or not sourced at all; I've seen a few answers that are various forms of "This word means X, I know I'm right because I'm a native Chinese!"
These are probably separate issues, and low-quality answers cannot be eliminated entirely, but what approaches can I use to discourage such answers? Can I phrase or present the questions in some way that makes it more obvious I'm asking about the why - and not what - a word means?