"And no, someone grabbing at you and yelling at you should definitely not make you think they’re going to harm you, especially when in a public space like that and the person is not a stranger."
Are you seriously saying that if someone grabs your arm while shouting at you, that your reaction is neutral? You wouldn't object to this - you see it as non-threatening, acceptable behavior? You don't see this as aggression? To me, it sounds like a clear attempt at intimidation, and intimidation always holds the implication of more harm.
Public space or not, it's aggressive, assaultive behavior, and the company should not be tolerating physical aggression from any of its employees. I'm appalled that Curry natters on about company policies - seriously, if your company policy doesn't specifically prohibit physically assaulting fellow employees, that makes it OK? For someone who presents herself as an expert on workplace bullying, she's missed the mark badly here.
And "not a stranger"? Really?