While I agree with the gist of the argument (Facebook shouldn't bring back user-deleted posts, and you shouldn't trust Facebook), the semantic arguments over the term "delete" are frivolous. It's not unreasonable for Facebook to keep storing things that I delete. Windows has the Recycle Bin, word processors have undo, databases have backups, etc. The problem is restoring the content without the user's permission. Citing a dictionary definition then overfitting your argument to that specific definition is something I expect from a high school speech class.