"As an initial matter, P2P software may, upon installation, automatically search a user’s entire hard drive for content. Files that users have no intention of sharing may end up being offered to the entire P2P network. Continued sharing of personal information is hard to avoid and is facilitated by confusing and complicated instructions for designating shared items. A study by Nathaniel S. Good and Aaron Krekelberg at HP Laboratories showed that "the majority of the users…were unable to tell what files they were sharing, and sometimes incorrectly assumed they were not sharing any files when in fact they were sharing all files on their hard drive."
Yes, that does indeed sound like the RIAA has admitted that most P2P users have no idea of what they're really sharing, or what they are sharing at all. This is yet another example of how the RIAA continues to put its foot in its mouth and contradict itself as it tries to put a stop to music file sharing.
Source:
Recording Industry vs. The People