Our culture, or lack thereof, is just unbelievable. If a comedian had made that joke, it likely would have been no problem for him (there would still have been some outrage no doubt), but people assume everything is so serious, even when there is no logical reason to assume so. What infuriates me is that the masses let idiots deny climate change and talk about how vaccines will give you autism without shaming them, yet they destroy people's lives for posting, let's face it, a funny joke. If you want to shame someone for being a scumbag, there are plenty of targets but no one is doing it. If you want to shame someone because you failed to understand the meaning of her statement, however, that seems to be the zeitgeist. Why go after a real target when there are innocent people out there who really cannot defend themselves and whose misery you can really revel in? The irony of the story of the woman who took the picture of the guy telling the joke and then got shamed herself is quite delicious in many ways.
Posting anything on the Internet, whether it's public or not (or rather, you think it's public or not) that you wouldn't feel comfortable sharing with the whole world is just stupid. Maybe people will realize this at some point. Hell, I'm worried about my home NAS that's not connected to the outside world, is behind two firewalls, and is encrypted. Of course, if it's that sensitive, it doesn't belong in any digital form.