The threads themselves may be able to be brought back, but how about those deleted attachments for them also? When I checked GP's section for myself before Friday evening's meltdown, all the attachments in the section were "awol", guest recolors and all. Are those also restoreable, or are they pretty much moot since the "deletion"?
For the non-Sims site I work on, there is an option for mods and up to remove attachments when deleting posts. Not sure if they use it, but I have never had a problem restoring attachments when necessary. Besides, at worst you go back to the last database or server backup.
Items can still be deleted in protest and a fuss made if they are restored without permission, but for the time being, deleting anything just increases the number of people who see the rug pulled out from under them.