The world is full of stupid questions that don't help make it a better place. These are the questions that cause unnecessary anxiety and stress in people, make them feel insecure or distract them from what is working in their life. For example, when someone asks my brother what he will be doing this time next year, it is of no use because he still hasn't decided what the next year will bring, nor if it will be the predictable "masters at uni" that they are most likely wanting to hear. This is a question where the inability of one person to focus and be grateful for the present, rubs off on another - whether or not they asked for it or not. This happens all time with older generations interacting with younger generations, the concerns of one can rub off on the other, opening individuals eyes to perhaps other concerns they should stress about. But usually it's less worrying that we need to do, rather than more - so I do believe these questions would be best kept behind the lips of their creator.
I am not saying that it is the fault of the asker of a stupid question, and in a sense this is all subjective from person to person - what would be considered as a perfectly okay question and what not. I think there are certain outlooks that individuals can develop from nurture/nature, and we have to withhold judgment from that. But when there is a scenario where a woman has some eczema around her eye and one of five friends haveing coffee with her asks her what it is - I really don't see the point in it. Firstly, observation and a touch of common sense are only needed to pull apart that it is in fact eczema and through asking, what are you going to achieve? A confirmed diagnosis? Increase self-awareness and anxiety in the receiver of your question? An awkward vibe at coffee?
Sometimes there are things that people withhold from the conversation for a reason. It might very well be staring you right in the face, such as a bad sunburn, a post-crying face or just eczema around the eye - but if the owner of these traits doesn't spur you to comment, then I think we should all take a body language lesson and from detecting the signs, lay off.
In high school, one of my art teachers always stared at us blankly and like an idiot if we asked a question that we could have easily figured out by ourselves, or just found out with our two eyes. At the time, it made me rather annoyed because he would loudly say "stupid question" in your face if you wasted his time, but now I'm grateful because he was one of the few people who valued being observant. I mean I've always been in love with shows starring observant people; Sherlock Homes, House, any detective drama - so it's appropriate that I'm not totally on the other end of a spectrum.
Being blunt and in your face is one thing, but asking questions that have their answers attached is just unnecessary.