I can't imagine a situation where I would spread an accusation against someone I don't know based on the word of other people I don't know. I'm frankly a bit confused why this is controversial - it seems like common sense to me, and nobody I know in real life has ever done this. (Of course, this is symmetric, so I wouldn't disbelieve the accusation either.)

Why would I magically trust two or three randoms when I dont trust one random?