I don't think I agree with there being two types. I like the categories in one sense, but I don't think one can say that a non-hostile situation might not become hostile. I think the more localized a situation, the less likely it beocmes hostile.

Also, I think the categories could get very gray, very quickly.

I like JIM's comments. As far as photogrpahs, I've been trying to get all of ours on dvd disks and want to give copies of the disks to relatives. When i finish, we should never need to worry about taking photos with us.