Oh yeah, there were a second question
I don't really mind many screenshots. Because of my bad memory, I'll probably have forgotten most stuff about them after just a little while anyway. Unless there are screenshots which reveals something about the story that I wouldn't have guessed, or something really odd, or unexpected, which might stick to your memory.
If I, for example, saw a screenshot of the
Spoiler:Underground tunnel
in the end of MI2, I would probably be waiting and wondering the entire game when and why that would happen (maybe not the greatest example, but the first thing that popped into my mind, I guess you get the point).