It's not sexist to make jokes about the word "dongle" sounding like "dong". They sound pretty similar. It's not very funny unless you're bored stiff or in grade five, but nevertheless it's pretty harmless joke material, and it isn't sexism. The examples you gave are sexism. If the two guys at PyCon had directed the jokes at Adria while also excluding her, then it would be sexism, but that isn't what happened. She just overheard their inane conversation.
Adria abused her power by escalating this issue to Twitter, and she got abuse thrown back at her. I don't believe she deserves it because nobody deserves abuse, but it's quite clear that it's a tit for tat kind of situation that she initiated. A clear example of her being abusive was that she fabricated the bit about forking repositories being a sex joke - and yes, jumping to conclusions and using the conclusions to humiliate someone is abuse.
As has been pointed out to you, "just snapping" is not an appropriate response to such a minor incident in a professional context. Give a talk or something. From what I've read, Adria is someone who is looking to be the centre of attention in a big drama and she got exactly what she was looking for. Losing her job will only fuel the Joan of Arc fantasies she has explicitly talked about.
In the end, I feel more sorry for Adria than the unknown guy from PlayHaven making dick jokes simply because it's clear she has far more issues to work through, and because this is hardly the end of her suffering. If she wants to blame it on a sexist tech industry she can, but I think she'd do better to look a little closer to home.