Seriously? Dick jokes aren't misogynist,and the joke the guy made wouldn't even earn a PG rating. Plus, it's a private conversation. If they had said something truly sexist (eg commenting about the body parts of a female presenter) I would at least understand being offended, but public shaming would still not be justified for an eavesdropped conversation.
It sucks, but it's really apparent that this woman used the hot button issue of sexism at tech conferences (which is a legitimate problem in professional presentations) to get attention for herself and her personal "brand" of anti sexism crusader... meanwhile, crying wolf like this potentially reduces the chance that later complaints will be taken seriously, and that actual sexism will be written off as a similar case of 'help help I'm being oppressed'!