AFAIK, Bill hasn't made any high-profile statements of this type in at least five years.
The actual eruption of this controversy seems to be the result of a low-end comic routine, which then unexpectedly went viral. Not something that is all that easy to engineer.
The MSM appears pretty clearly to have been caught by surprise.
IOW, I think it's much more likely this is a random occurrence than a conspiracy to tear down Cosby as a warning to other black men.
I will assume Mr. Carson hasn't molested or raped dozens or hundreds of women, so I'm not entirely clear how this is supposed to warn him off.
Consider the blatant abuse of innuendo against Herman Cain, just when it was looking like thee were some real prospects.
I do not believe Mr. Cain ever made any of the advances against the accuser that were inferred. This was a David Axelrod “dirty tricks” operation designed to take out Herman Cain at a critical moment.
Depend on it, something similar is being planned for Dr. Ben Carson, and there need not be one whit of truth involved. Just the APPEARANCE of impropriety would be sufficient.