Yes, well even AVG has had these things happen.
Just goes to show the NEED for BACKUPS - everyone out there can potentially flag and delete your stuff. Without a good backup then your hosed

The point I tried to make over there is that it really doesn't matter who your favorite vendor of such software is. Sooner or later they too can accidentally flag and remove stuff they should not, but doesn't do you any good for them to apologize - If no backup then your just toast.