In reverse order:
No, I have no problem with the concept of consent. What I had a problem with was shoving it in our faces at every opportunity. Those “consent culture” posters were placed so that they seemed to be everywhere as we went around the con. I also object to the specific term “consent culture”, in implicit opposition to the silly concept of “rape culture”. The con agreed: they did not put up those posters the following year, and reworded the page in the con book to remove the term.
I don’t need a safe space. I object to the concept; the world is not a safe space for anyone. What the con is doing was creating safe spaces for the politically correct Left and demanding that we all follow along.
SF&F itself is not apolitical, granted. (I’ll see your “The Day the Earth Stood Still” and raise you Starship Troopers and The Moon Is a Harsh Mistress, two of my absolute favorite works in any genre.) And if the con wants to be political, that’s its choice, but if it wants to be politically-correct leftist, it will do so without me. Before the current tilt, it was apolitical, and did it well. My argument is that that made it a much more enjoyable place to be.