I think people totally privilege hypotheses they've read about in compelling fiction. It's taking on board fictional evidence. I find it helps to keep in mind that a plausible story has too many details to be probable - "plausible" and "probable" are somewhat opposites - though it's harder to remember for a compelling story.
WARNING: Memetic hazard.
http://www.slate.com/articles/technology/bitwise/2014/07/roko_s_basilisk_the_most_terrifying_thought_experiment_of_all_time.html?wpisrc=obnetwork
Is there anything we should do?