OP here. You raised a point that I should have mentioned in the article: screenshots of web pages that don't include the URL. I'm perfectly fine with screenshots of browser windows, since the context is almost always relevant. The system I work on right now puts a lot of useful context into the URL, but it's almost never included in the initial screenshot, so I have to ask for that. Of course, I generally ask for it as text so that I don't have to try to type the whole thing without making a mistake.