Nebula

The problem with that approach is that when they ask that question, they're performing for an audience. An audience that is as-yet undecided. If you're outwardly rude to them, that audience is more likely to think "oh wow, this person's fans are arseholes, maybe the accusations [though the specifics of the accusations haven't been made clear] are correct". So IMO it's better to just prod them into revealing that they, in fact, are the arseholes, and just let that sit. Keep focused and don't allow yourself to get distracted by unrelated points that they will inevitably try to bait you with.