As with any waterspout or tornado, the best advice is to be in an interior part of the lowest floor of a sturdy building - and not outside, whether sharks are raining down or not.
Madness string 2302
Conspiracist ideation is often associated with low self-esteem and feelings of powerlessness. The conspiracist feels empowered by these beliefs because s/he becomes part of an 'elite' who know the 'truth' (what they don't want you to know!). This also produces a confirmation bias where they seek the echo chamber of supporting evidence. Contradictory evidence is dismissed because it is viewed as a personal attack by undermining the thing that gives them power and esteem.