I think that business has to stay a bit neutral, because it's a place where people are thrust into. That's what etiquette is - it's a way of ensuring that different people follow a similar set of rules so that there is no friction.

If a person wishes to publish such a presentation on his blog, that's fine, but not at a conference. Imagine the presentation were about aborigines in a similar manner. It would be regarded as discriminatory, and similar rules should be used to judge sexism.