I see this as a product of the entitlement mindset. Plus people have become down right rude. If I am forced to be with anyone like this I would have to educate them on maturity and grace.
Had I seen this happen, I would have grabbed the baby and told the mom if she wants it back to knock if off. Really, someone could have stolen her baby and she would have been so engrossed in her own selfish bad@ss behavior that she would not have noticed.
Honestly, I don't know of any female friends or family that would behave like that. We are more focused on problem solving, planning things and projects that such stupid petty issues don't have time to fester.
It's pretty sad to see such a cultural low.

There are already existing laws in place, call 911 and let it go!
If you are in a shtf and you haven't anticipated problems, you shouldn't be in charge anyways. Find a leader, and be careful with who you choose.
Lead, Follow, or get out of the way!

only thing about dailing 911 is that you just issued a search warrant on youself. more than likely you will be the one going to jail. its just a thought , or is it?

This is why you CHOOSE the people that you "shelter" with very carefully and agreeto the rules before you get to far into it.

My family and friends are civilized so I know they wouldn't act that way. I would have to feel really threatened if I ever raised my hand to another and if it ever came to it I would have plenty of back up. I'd never fight just to get a seat on the subway.