It used to be that the RIAA wasn’t as worried about music copying because, when you copied a cassette, then copied that copy and so on, the recording degraded with each generation. Theoretically, digital brought us perfect copying every time which really annoys them. However, look at the possible degradation that is happening. As some popular video clip is copied to a DIVX file, it loses data. Then as it is uploaded to YouTube, it loses other data. Then, as it’s ripped by someone to another lossy compression format, it loses more. Similar with WMA to mp3, etc. Anyway, it seems like some of that degradation is coming back in some ways.