I kind of did it before asking this on this question, and it occurred to me that some people might not like it --after all it's their own question. Do you think it's acceptable to do it, and if yes, when?
I think it's valuable sometimes to have a picture, and from promotional perspective, posts with pictures tend to attract more upvotes and attention. In this case it's pretty clear cut IMO, but I'd like to hear from others as well.
I think it's ok if it adds to the question, ie helps to make it clearer what the person is after. If they're talking about bathing elephants, the mental image may boggle some people, so a picture is helpful. If however, they're asking about speaking only English in India, for example, that's going to be less helpful to add a picture to - as it won't add to the question in a useful manner.
I'm all for it, personally, as long as it improves or assists the question.
Questions and answers on StackExchange sites are collaboratively edited, like in a wiki. Adding images to questions as long as they are relevant and properly licensed/cited is okay.
