Earlier quoted context omitted.
It seems to me that it might have been worthwhile talking to a bouncer or other member of staff to warn the guy to stay away from her, or risk being thrown out. Whether or not that's reasonable, I don't know; but if the guy was a real problem for her (and from her side it sounds like he was), then "telling people" at that point in time, rather than afterwards, would have been more prudent. There's absolutely no reaso…
His choice of career has fuck all to do with that, and neither does the conference. It kind of does, though. According to Julia's account, this was not simply an isolated incident. When she talked to the organizer, he admitted that this individual who behaved in a harassing way had shown a previous pattern of behavior of this type. Since the organizer knew of this, this behavior presumably took place at other events…
However, I'm still loathe to apportion blame or make anyone except the individual accountable for their own behaviour, insofar as it's suggested that the organiser doesn't condone that behaviour, and merely wasn't sure what to do in lieu of the ability to refer to existing policy.
That problem, with this particular conference, has been solved, I would think. However the individual will still very much be under the impression that he's not being a dick. Because he wasn't properly called out on it as and when it was happening.