I have been shredding my own for a while, since it's typically cheaper. It just happened to be that I was feeling lazy one particular day and bags of shredded cheese were on sale.
We always have blocks of hard cheese and cheddars in the fridge and I feel fine cutting off any moldy bits. With the shredded stuff, I'll forget about it and we end up binning lots since its impossible to tease out the bad from the good.
