Quote Originally Posted by Furious Mental
Well as with every law it will might depend on where you live, but I strongly suspect the answer in your jurisdiction is no. It is definitely no where I live (Australia). Basically when it comes to copyright of electronic materials ask yourself whether something is
A) Fair; or
B) Realistic

If it is either fair or corresponds to what everyone does in reality, then the law most likely prohibits it.
QFT

@ the OP

If you've cleaned off your disc and there are no bad scratches, and have tried it in another machine just to be safe, then it's probably not your disc. Try some of your other discs in the same computer and see if you get some random crc errors. This is really hit or miss, some discs that are known good could work fine in your drive, others may not. If you start to see that a few discs have problems, read on.

As sapi suggests, it could also be your drive going bad, and/or some crippleware installed by some other apps/games that is interfering with your drive's normal operation. The main culprit and strawman that many of us have dealt with before is Starforce. If you have any games that use Starforce, I strongly suggest you remove them and the crippleware itself, here's a link to a site with some games listed to see if you have on on there, and some removal tools http://www.glop.org/starforce/ . My current DVD drive is on it's last legs because of this, I didnt' know that the expansion to Lock-on had this "protection" scheme installed, and next thing I know I go from a perfectly good, relatively new drive to one that's starting to show it's age mechanically and not reading discs at random. Feh. Of course there are a few other "protection" schemes, apps, and drivers that can cause you headaches, but this one by far seems to be one of the worst as it forces your machine into a mode of operation that can harm your hardware.

Good luck. Yer gonna need it.