There are many many things that actually are a waste of time. If you make a reasonable attempt to see if it's been suggested (broadly, there's a tag for most main areas), and you can't see it, then submit it.

(I actually have the same reaction with doctors, I don't want to waste their time with minor problems, I've been told my 'minor cold I can't shift' is probably chronic sinusitis that could be cured quickly, so I know exactly what you mean).

And yeah, lots of suggestions, people submit regularly, but the queue is only released when Denise remembers, I have it on a separate reading filter as the day she does remember can be, well, a bit swamping...