Because it would saturate the network with queries & requeries & become slow as heck. I used a program that did that before LW. It could search the entire network (different network) but a single search could take 40-80 mins to complete. Do you really want LW to become like that?

Here's some points worth considering: http://www.gnutellaforums.com/showpo...&postcount=126

http://www.gnutellaforums.com/showthread.php?t=56566