I don't think that would work because when a file gets reported they usually delete all files on their servers with that md5
^ nope, it doesn't work like that.. once an md5 hash gets blacklisted on rapidshare, rs will delete it the next time it is uploaded at the upload stage. but since the backup files are already on rapidshare's servers, they do not get deleted.
just try it and you'll see what I mean, it works.
... and even if you don't believe me, just use rs2rs to make a backup set of your links, that works too.