I find it a little hard to credit that someone who considered themselves enough a part of the sceptical community to attend a sceptic conference would be unaware of this whole kerfuffle. There's not many people who are active in these circles who haven't, I'd have thought. I mean, I have absolutely zero intent of ever attending a sceptical gathering, I don't read any sceptical blogs, or follow any sceptical vloggers, or even visit any sceptical sites other than this one and, even so, I only peruse the message boards, rather than reading the main site. Yet I know a fair bit about Elevatorgate.
So I find it unlikely that ElevatorGuy hasn't heard the term "Elevatorgate". And it's rare to hear that term without also hearing the name "Rebecca Watson". Were I him, upon hearing the name "Rebecca Watson", I'd think "oh, I met her", and find out what "Elevatorgate" was all about just out of curiosity.
What I think is far more likely than that he has never heard of it, is that he heard of it after it all blew up and decided that he had no interest in getting involved in a bitch-fight with half of the internet, and so decided to remain anonymous. Can you imagine any side of the story that he could give that a) hasn't already been put forward by someone, somewhere and b) wouldn't get shouted down as ridiculous/misogynist/misandrist/whatever?
Shut up and pretend it's not you seems like the best way to live a life unhampered by stupid and tiresome drama.