A few of my CDs went "skippy" on me. Seemed to be mostly ones with more than the standard 74 minutes of audio on. Then I bought a decent CD player, and even the badly scratched ones play OK on it. Perhaps its a digital thing, but I can play one disc on mine that no-one elses I know will cope with.
Like a previous poster, though, any CDs I travel with I copy first and leave the originals at home in their cases. Damage isn't the issue here, but if they (originals) got stolen I would be more than a little bit pi$$ed off.