is distinctly worse than other forms of social media. reporter: haugen providing research to back up her claims and lodging clants complaints with the s.e.c. suggesting facebook could be legally vulnerable. everything from how much hate speech is removed from the platform to some of the very serious problems they ve had expanding user demographics. reporter: now facebook is aggressively defending itself calling the claims misleading and saying users benefit from its services, a sharp contrast to haugen who makes it sound like a toxic swamp. people enjoy engaged with things that illicit a emotional reaction and the more anger, the more they interact and the more they consume. reporter: a global problem causing a cycle of poisonous politics. but facebook saying that advertisers don t want anything to do with that. so neither does facebook. we have no commercialin