In fact it's much easier. Just laugh and point fingers at them. Then banish them. By simply ignoring them.
Then why some people are falling for scams, frauds and hoaxes constantly?
You might not fall for this hoax or that scam, but your grandparents may even though they are intelligent.
Hoaxes and scams just must align with their wishes and beliefs.
On Internet we all are cavemen

Ever you saw less than classy websites like certain Reddit communities - "subreddits" ?
It has a lot of subreddits pointing at human awkwardness/stupidity.
Of course reddit has benign communities like dedicated to science, space and cats.
Its just that some of us stay nicer than others.
Or behave differently depending in what (sub)community we are.
Also competitive online gaming - like MOBA, MMORPG tend to have people acting like cavemen
That is some people tend to respond emotionally instead of rationally.
Heh. Sounds like it's the beginnings of government

A group of criminals (future nobles) with guns and leader (future king) robbing honest farmer
In prehistoric era life was short and brutal, same with beginning of governments and religions.