In the other YC thread the guy who got fired said he and his coworkers were using 'fork' as something they're exciting about forking on GitHub. The woman who posted their picture essentially inferred that they meant something sexual about that.
As for the last point I am pretty sure she herself admitted that she wasn't in the mood to argue with anyone so she just took the picture instead of confronting them about their comments.
As for the last point I am pretty sure she herself admitted that she wasn't in the mood to argue with anyone so she just took the picture instead of confronting them about their comments.