I've been sharing since 1998 when Napster was getting a start. I know that I have never contributed an original piece to share but have always shared what I downloaded. I was on dialup (28.8)back then and had a 486 100 mhz overdrive with 72 mb RAM and a 2.1 HDD. Damn I was in my glory. If some of the "oldsters" had banned me back then as a newbie, I wouldn't be able to share what I do today. Contrary to what Sphinx said, there was an overabundence of folks who didn't share as attested to in the Napster Forums. But The network grew to over 80 MILLION REGISTERED USERS. Many past, present and future apps may vie for the title but I don't think any will ever achieve the popularity of the "KING". I checked some of the people who seem to be sharing "viruses" (851.7 mb zip files) and some of the spammers (106.8 wmv and the other ipod ads) and would have banned them except for the fact they, i believe, had no idea of what they were doing. (for the most part that is)
So I figure as long as I know what I am downloading and what I am sharing (Bitzi searches, verified d/ls, virus scans, and spyware/ adware programs) I won't ban or block anyone. They just may (and some have) share a file I need to make my collections complete.

As someone else is so fond of saying Thanks for the files.