The problem with your idea is that it is going to just create more hate. Being noob isn't a defined and precise characteristic, you therefore cannot really judge who is and who isn't a noob objectively. Your goal is good, but in the end, it's going to be noobs thinking they are superior hating other noobs.
There is no rule against "nooby" saves. If you don't like it, downvote and move on. On the other hand, if a user makes inappropriated tags and hateful saves, you can report their act.