Enhancing mIRC's file serving features in such a way would cause problems,
it would just help fuel the fires of the "mIRC is not for file sharing" debates.
Man is that all you ever think about? I bet you have nitemares
about it don't you, waking up in cold sweats screaming out
PEOPLE, MIRC ISN'T A FILE SHARING PROGRAM!!!!! 
Aaaaanyway, I disagree with this suggestion
as well, just not for the same reason as yours.