Good point. That's why I don't have much of an issue with the Red Scare, McCarthyism, and blacklisting. Those people were accused by multiple colleagues...so there had to be a little more to the situation than what those people tried to explain.
edit: My original comment was something along the lines that if 4 people accuse someone of being a witch, then there must be something there. I edited my post within a minute, and no one had replied to it yet(from my perspective). Maybe HN should support append-only edits, because I didn't realize what I was doing was wrong. In my mind I was just rephrasing my point without using cliches("witch hunt")