[bbrtyth]

If the presenter is actually saying something that is totally wrong, I would argue that they should have chosen a different topic and Katz was doing that conference a service.

Edit: although maybe he could have been more polite about it? But sitting through the misinformation seems like a waste of everybody's time.

[caseysoftware]

I think there's a difference between the presenter being wrong versus a way they could do it better.

If the presenter is wrong, a polite correction/adjustment can be fantastic.

If the presenter is just.. inefficient? Then maybe it can be turned into a learning experience involving but not embarrassing the presenter. Then the guy walks away thinking "wow, so-and-so taught me how to do this even better!"