There was a bit of a brouhaha about this a few years ago with TV pundit Glenn Beck as well. Beck has a certain style of saying he's "just investigating" questions, where he'll posit some extreme allegation, and wonder out loud why the target of the allegation won't go on record denying it and provide evidence. He'll insist he doesn't even necessarily think the allegation is true, but just wants the questions to be aired and discussed openly, and says refusal to do so is suspicious evasion.
In response, someone started a website wondering aloud why Glenn Beck won't deny allegations that he raped and killed a girl in 1990--- the website author, of course, claims he doesn't believe the allegations, but is just wondering why Beck won't address them publicly, and provide evidence of his whereabouts at the time of the alleged incident. Beck, of course, sued for libel in response...
In response, someone started a website wondering aloud why Glenn Beck won't deny allegations that he raped and killed a girl in 1990--- the website author, of course, claims he doesn't believe the allegations, but is just wondering why Beck won't address them publicly, and provide evidence of his whereabouts at the time of the alleged incident. Beck, of course, sued for libel in response...
http://scienceblogs.com/dispatches/2009/10/beck_tries_to_kil...