Well, it still might not be the first use of the word. I'll ask the OED people to track it down.
I suspect it might have been coined by Limbaugh or one of his callers. At least he/they probably gave it popular parlance.
But since the poster I cited, Wayne Mann, was a big deal on the alt.current-events.clinton.whitewater usenet group in its hey day during the early to mid '90s.
So it might have gotten its start from there.
Not that it's that much of a phrase anyway. It certainly doesn't rank with "vanity" or "disruptor" or some others that come to mind.
LOL