Don't do this because people would only limit other people from downloading stuff and that HURTS the sharing process the newer clients know whats best for the network so don't do this

there is a point of too much control for stupid people not saying people who use Gnutella are stupid but quite the oppsite be careful to the network please. (-: its cool.

P.S

take into carful consideration what you do to the clients
what you do is adopted very quickly it could have devistating effects on the network.