I'm asking because I heard it wasn't good for the CD, that it would leak through and make it unreadable after a while. I have read this on a few different sites and I was wondering what you all thought. How valid is this? I've started using cases now and just use a piece of paper to write what's on the CD (you can imagine how lovely that looks!)

CD's that I don't have a case for, I just write really teeny tiny with my Sharpie and pray nothing happens
I've heard of CD labels but don't know much about them.....
Tell me what you think about this whole Sharpie thing.