Take, for example, the long-running Republican voter suppression tactic of using targeted messages to mislead demographics likely to vote Democratic into thinking that the election day is later than it is.[0] This is objectively false information: the date of elections is officially determined, widely published, and not subject to differences of opinion. Entities which spread this kind of information are engaging in disinformation campaigns.
Other trivially identifiable disinformation campaigns include claims that 'urban liberals' were setting fire to rural areas in Oregon, claims that the IFR for COVID-19 is no worse than that for influenza, and conspiracy theories that push hydroxychloroquine as a miracle cure for COVID-19. There's no gray area with any of these issues; the lines they push are objectively false and are socially destructive.
Dealing with information gray areas is hard, but an awful lot of disinformation is trivial to identify and wouldn't be difficult to clean up if it wasn't beneficial to large piles of money with close ties to social media companies.
[0] https://en.wikipedia.org/wiki/Voter_suppression_in_the_Unite...