I agree that the user wasn't being super-careful, but it's entirely reasonable to think that, if Google docs appear on your local hard drive, that they are files that can be manipulated just like any others, and that copying/moving them to another folder would preserve their data.
I still feel bad for him - but the warning clearly says:
"An item you recently removed from your Google Drive folder has been moved to your trash on drive.google.com.
This item is just a link. If you empty your trash on drive.google.com, this item will be permanently deleted."