Publicly humiliating somebody is the use of mob rule to get justice instead of the existing structure we have all consented to (ie, the PyCon staff.) It also does not permit the person being humiliated to get in his or her side of the story. Thus, while the men might have done something stupid, inappropriate or even shameful, the public humiliation was done by her because she escalated by inviting mob rule instead of using the official channels.
While using mob rule may be a reasonable second alternative if the existing structure is corrupt and unresponsive as it can change who is in power, it is not an acceptable first solution.
I find a certain amount of delicious irony in the idea that somebody who tried to shame people using mob rule wound up burnt by a different mob. Shame there was so much collateral damage.
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