/window -h $nick
this hides it, is this what you want or do u not want the window opening ever?
if the second uses this
ON ^*:OPEN:?:*:
this is the same as ON ^*:TEXT:*:?: but occurs before the window is opened, (but only if the window is not in existence), also watch out in that if u allow it to exist, (dont do a HALT), then the ON TEXT event triggers with the same line of text