Well, just one word to "shutdaf***kup" Mr. I-know-everything-better:
If you don't like Gnotella, there's three things to do: First: don't use it! Second: Programm your own client (and I guess that one would suck a lot more!) Third: Go crazy like you do - but NOBODY CARES!

The idea with disconnecting people who don't share is ok, but: I think it also sucks when people share a dozen 650MB videos and then you find out they're connected with a 28 modem, or they only stay online for one hour once a month!
But what really sucks most is sharing all that incomplete stuff (usually directly from the download directory)!