I dunno, I was there in the very early 2000s and as I remember it, for the subset of programmers I knew on IRC at the time, it was as Susam says: writing a shitty IRC bot - not a script, something from "scratch" that actually spoke the IRC protocol - was almost a rite of passage back then. From rose-tinted me-tinted glasses, I seem to remember that IRC-bot-related questions were a plurality of the questions asked in #vb on Dalnet back in the day!
You are also right to some extent as well; I wonder how much mIRC scripting has been underestimated as the gateway drug to programming for thousands.
(Rose-tinted/me-tinted disclaimer: the first non-trivial program I wrote was an IRC quote bot, in Visual Basic. I later rewrote it into Python, because I wanted to learn Python, which eventually led to my day job today...)