Hannity aired fake footage of that rally/press conference and Stewart called him on it. Hannity was forced to apologize to viewers - though he stopped short of vowing to ensure such fakes are to be absent from now on. (Maybe he was just distracted, all busy organizing his Conservative Dating Service, Hannidate.)
Writer and blogger pegged the real problem of such fakery:
"Jon Stewart and his outstanding team of "Daily Show" producers and writers not only "get" the importance of media manipulation and propaganda, but they can take it a step farther because they also have something that most bloggers do not --resources. Their access to large film libraries is what helps them to take down Fox, CNBC, and all the other media types (and politicians, too) when they say the polar opposite of what they were saying a year ago or even a month ago.
You know who else has those kinds of resources? Mainstream, big media newsrooms. But big media pathologically refuses to think of itself as a part of the national narrative, even as the millions of people who watch Jon Stewart or read your top political blogs know better. And until we in the old media can comprehend that, the new media will continue to leave us in the dust. So will the "fake" media.
Rather than the oddity Hannity wanted to place this incident among, Fox producers have used crowds before to add outrage their "reporting", part of the same "rally" Fox promoted in praise of the power of Glenn Beck.
Distorting news is simply part of the news philosophy of FoxNews.
"This is the West, sir. When the legend becomes fact, print the legend. " (via)