It was needed one comic to not shut up about Cosby being rapist for the whole issue to cause his downfall. That is why it is the Cosby effect. The same as Streisand effect is named after Barbara.
Do you have any evidence that he's a rapist? I know he hasn't been convicted, so I would hope you at least have something more than an unfounded accusation.
There's been an update since the joke: Over a dozen women have openly accused Bill Cosby of being a rapist. I know it has been widely reported, so I would hope that you aren't reducing the statements of those women to "an unfounded accusation."
It is a classical case of he said, she said, she said, she said, she said, she said, she said, she said, she said, she said, she said, she said, she said, she said, she said, she said, she said, she said, she said, she said, she said, she said, she said, she said ... don't we hate when it happens like that.
Actually, that's the technical definition of "unfounded accusation". I don't have to reduce, that's what it is.
Sorry, I only have dozens of unfounded accusations that say he might be a rapist. Do I need something more substantial to say that he might be?
20+ women, all telling eerily similar stories spanning across 4 decades ... it is enough to extinguish reasonable doubt for me.
Then a better name would be the Hannibal Buress effect.