I read the presentation, and took a look at the slides.
First off, there is NOTHING in the talk that could be construed as "harassment". There's some use of the word "fuck" in there, but being european where the use of it is quite normal, I consider this a US-problem. It might be "offensive" to them, but it's certainly not harassement.
The pictures: Yes, there is clearly some sexual content there, but that does not imply harassement per se. Most of these clearly are not harassment (except maybe for pigs, who might object that they're depicted as goose-fuckers).
I don't know about BDSM-people, but they could actually feel harassed and ridiculed by Image Number 36, and certainly, homosexual people could feel offended by picture 39.
So it might have been right to trigger anti-harassment policies, but certainly not on the grounds mentioned thus far.