Re: "look at their 'requested' documentation"
Why do they open it? Closure - that incredible human *need* to tie up loose ends.
You've just handed me a wrapped up box with my name on it that could have something REALLY IMPORTANT in it, and you're asking me to just throw it away?? But then I'll never know if it WAS something important. No closure.
That's why this behavior is so incredibly difficult, if not impossible, to stop.