...Unless they're really useless or are too sensitive (I never send sensitive information via email, but despite my best efforts, I do get them sent to me). But I guess even that's not consolation that the information was private by any stretch of the imagination.
I keep trying to explain to people, email with Yahoo, Hotmail, Gmail etc... is like having a private conversation in a coffee shop or something. Yeah, you can get "some" privacy, but really, anyone can listen in or record if they really wanted to since you don't control the venue. Anything without PGP/GPG encryption is like that.
I can only imagine what this might be like for those folks. If this happened to me, and if I do delete messages, I'd be not only livid, but hosed as well. How can you sift through that much info in a single morning... or a week's worth of mornings?