The best tagging system is a micro tag with scanner! However that is out of the price range of most here, although I think a few of us could afford it if we really wanted to. I saw it available in the AES catalog a couple of years ago but don't think it's there this year unless I missed it.

As far as the spagetti tags etc. I've seen them create some nasty infections and be aware they don't last indefinitely.

If pigs could fly bacon would be harder to come by and there would be a lot of damaged trees.