>That's how we got the Salem witch trials and why mere accusations aren't usually enough.

That's how plenty of hard-working, innocent, Americans got blackballed and had their careers ruined by McCarthyism.

The House Committee on Un-American Activities resulted in many things, but the Hollywood Blacklist alone was something like 150 names of almost entirely innocent people. Those people couldn't get work because someone accused each of them of being communists, often with zero evidence.