What makes you think that persuasion isn't capped at some lower level than world-ending? There's a lot of incentive for ads to be as persuasive as possible, but they are so far from ending the world that it'd be science fiction for an ad to be that effective.
If you're just talking about convincing a few individuals to do experiments, then there are plenty of people who fall for scams everyday.
If you're just talking about convincing a few individuals to do experiments, then there are plenty of people who fall for scams everyday.