Banned Greedy Client is something LW does, not a user does. LW will automatically ban clients (usually older versions of LW or other gnutella programs) that continually make the same requests in short succession in a short time. The gnutella network dev community try to keep traffic down by improving the programs all the time & agreeing to certain protocols. Older versions were not so community friendly re: traffic.

Re: iTunes; it will open automatically a song has finished downlding. And I think most OSX users would prefer to use iTunes compared to the LW media player for listening anyway. lol