Yes, I heard that, and noted it well. Rush also said somewhat cryptically that he had researched this phenomenon well, and that he knew what he was talking about. I had to turn the radio off and go back to work at that time, but I assume he had had his crack research staff check into the dynamics behind the "Stop Rush" agitators on Twitter (or was it Facebook?).
It's very interesting. It's a direct result of the "Wild West" aspect of the Internet. In the old-time west, a mob could do a lot of damage - including murder, even multiple murders - and no law could offer protection. In fact, the law might be on the side of the mob, which is what is happening in this case.
Yes, a great majority of the anti-Rush campaign is being run, it was discovered, by about 10 people....but they used technology to make it look like there were thousands and thousands demanding Rush be banned.
This story came out about six months ago, I think.