The Sony music label (or main Sony music label, I don't know) BMG, was cited for planting trojans and or rootkits on a users computer if they put a Sony music CD in their CD drive on their computer. I don't think they did it with every artist but just the popular ones at the time.
Sony's defense of this practice was that people didn't know what was on their computers anyway and that it wasn't anyone's business except for Sony.
The problem came to light when it was discovered that the rootkit/trojan that Sony planted was vulnerable by those to whom the secret was leaked out to. Needless to say that the hackers in the know took advantage of exploiting what they could.
Anyone else remember this? It was about 2005/06. That's all the details I have on that.