Stephen can't control his audience; he only passes judgement on them.
First appeared on the August 2nd, 2006 airing of episode 130 of The Colbert Report as Stephen Colbert was speaking about a gallon of milk that had given him a stomachache. An Interrupting Audience Member (IAM) asked Stephen to put milk On Notice, but Stephen cited the long process involved in putting things On Notice, and declined to. He did, however, threaten to make Interrupting Audience Members the next item to go On Notice.
On the June 18th episode when Stephen was telling America the word (McConaughey), an IAM shouted out "boo!"
Stephen had to wait for his mob to remove and beat the scofflaw before he could finish.