the Pycon conference adopted a code of conduct and last year saw a record number of women attending and giving presentations:

http://www.forbes.com/sites/women2/2013/04/09/record-number-...

clearly you can play the "correlation is not causation" card here but anecdotal evidence of "harm" done by a CoC isn't any better.

Also, the CoC's we're talking about here wouldn't eject someone for using the word "pussy". if anything, it would protect this person as the CoC would call for an appropriate reaction, instead of an off-the-cuff overreaction.