Publicly internet shaming someone for a middle school joke overheard at a conference is less professional than making the joke, and I buy the argument that it would "interfere with her doing her job." It'd be different for a more direct or egregious joke or if someone on stage said it.
Apparently she's been a lot more quiet for the past few years to the point that she's harder to google without second order effort. This backs up that what she did was unprofessional and interfered with her job, but I'm torn over this because it also means she got silenced. Then again, are "dongle" jokes the hill you want to die on? Or TWSS? This was in 2013 before the term "woke" was even popularized.
Not sure what her race has to do with this, though.