I am in the industry for 25 years and have participated (and in the vast majority of cases - spoken) at many conferences. I have never seen it happening.
I am an average man and met other average men and women at the conferences and it was like any other meetings: sometimes interesting, lots of chit-chat, lots of boring people etc.
I never saw anyone harass others - my experience is in Europe, the US and a bunch of conferences in Asia.
I have also regrettably not witnessed the executive orgies everyone talks about, despite having been at all the right after parties.
This DOES NOT mean that it does not exist - the case in the article is an example of assholes who statistically exist in all populations who should have been told to fuck off by someone around. And shove their sense of humor in a dark place of their body.
I am just kindly challenging the extremely common part.