Double security

I was busy sorting out some old files today and my paper shredder was busy slicing up any bits of paper with personal data. I have heard that if an identity thief is really, really keen then they can piece together all these bits of paper to get sensitive information although i am very sceptical that anyone would go to that trouble. Anyway, all my shreddings go to feed the worms in the wormery.... I am pretty confident that my identity is safe with them!