Brother Dana Blankenhorn looks at a new form of behavior among filesharers: file hoarding (File Hoarders Get BitTorrent Win).

I think the word hoarding says more about the motives of the users, and the way toward ending the practice, than anything else. Thanks in part to the industry's rhetoric, and in part to its actions, many lovers of music and other files are afraid they will lose access to the culture they crave. Thus they demand to have physical copies of its artifacts, and grab all they can. It's classic hoarding behavior.

But time is the limit here, not space. You can only listen to one song at a time, watch one movie at a time. It doesn't matter how big your collection is, the only way to get enjoyment out of it is to play the files.