Well, here's my info....
First of all, I have a Toshiba sd1200. At first I was excited at the fact that it would replace my cd player. But since I burn a lot of my own CDs on CD-Rs at first I found that it gave me "disc errors." It couldn't even read the disc. So I was disappointed and looking forward to purchasing a better player the next time around when I stumbled upon a DVD FAQ list here:
http://www.thedigitalbits.com/officialfaq.html
check out questions 2.4.3 and 2.4.4.
So I tried it and IT WORKED!! Well, so far it has worked fine. It has been a couple months. But who knows? It might be slowly destroying the disc as we speak if what you said is true. But all I'm sure of is that ever since I burnt stuff on CD-RWs I've had no readability problems. Oh, and I basically burn WAV files onto data CD-RWs. Hope that helps.