I would be happy to take part in a public debate with a scientist who disagrees with the issues I raise in my talk. This could take place online, or on Skype. My only condition is that it be conducted fairly, with equal time for both sides to present their arguments, and with an impartial moderator, agreed by both parties.
That would be incredible to watch. Level playing field, no sound bites, and with some savvy audience immune to rhetorical tricks, and I already know who is going to come out on top.