I know perhaps a flame is in order however I was playing with DCC using some scripting and came across a behavior that could be changed. I scripted a /dcc alias (I know, I know, not a good idea) so that I could extend the /dcc feature while keeping the average user comfortable with the command. However, when trapping /dcc, and you drag and drop a file over a nickname in a channe, mIRC returns "dcc send #drag-drop-channel filename." Perhaps changing that to "dcc send nickname filename" would be more practical on the scripting side of things.
I know that mIRC more often then not does this intentionally for internal purposes, though to provide some extendability for this particular issue, maybe changing this could be a benefit..