I've seen conferences called out for having too few female speakers. They made talk choices based only on abstracts, not on speakers, and ended up with a highe

I've seen conferences called out for having too few female speakers. They made talk choices based only on abstracts, not on speakers, and ended up with a higher percentage of female speakers than had submitted. When they informed the person who called them out, they were then effectively told they weren't doing enough, and directed to a web page that told them they need to do more to encourage female submitters, such as doing the things they were already doing. This occurred over Twitter, and I'm not going to dig up looking for it (it happened about a year ago). I realize it's not exactly what you asked for, but it was a clear case of "guilty until proven innocent."