Adding this on behalf of Bonnier:
We noticed in Site Service you can all-to-easily, accidentally delete an entire section with one click. We assume, in this case, all content that is inside that section would be removed from the Site Section.
It would be ideal to add a confirmation dialogue box upon click of the "Delete" button, saying something like this:
Warning: You are about to delete an entire Site Section. This action cannot be undone. Are you sure you want to proceed?
"This action cannot be undone"
I think the action actually can be undone though. If you go to the top right of the site service UI, there should be a trash icon where all your deactivated sections are available to restore. (The "delete" button should really say "deactivate".) I haven't tested this but I think the content affiliated with a section that is deactivated maintains the affiliation because the sections are never truly deleted using the site service UI.