I have noticed that although when inserting an image part of the code that SE Inserts when you upload it is text saying "Enter image description here" but people very rarely put image descriptions and that is really annoying for blind people.
I think it may be because not everybody who asks on a SE Site is techy and only some people will even think of modifying that code.
I think you should make entering the image description a required thing so that people don't just overlook it.
It's just so annoying having to always post comments like "What does that image show?", "What would you describe that image as?", etc...
Any help would be appreciated.