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She publicly posted without consent a picture and an incriminating comment in an increasingly context of being touchy and wary about gender issues at tech conferences.

Of course this has a significant potential for HR to do PR and distance themselves from their employee in an attempt to save the company image and avoid a potential pro-feminist backlash. Though I agree play haven overreacted, from their despicable business activity it's not that surprising, and past similar experiences points towards this as almost predictable and expected.

But for a dev evangelist, this was highly inconsiderate and irresponsible thing to do, it looks like she didn't care about the consequences of what she did, and got fired over it. Which makes sense too, as explained by sendgrid here: http://blog.sendgrid.com/a-difficult-situation/ she did it all wrong, made her employer look bad, had the opposite effect of what her job position asks for, render herself ineffective at her job in the future, and inadvertently endangered her employer business.