These people don't seem to have an adequate sense of "what if".
Obviously they aren't thinking "what if the house catches on fire while we're gone" or "what if there's an earthquake while we're gone", and so on, but also they aren't thinking "what if baby simple wakes up and misses us and is heartbroken for the eternity it seems to the baby before we get back".
And honestly, that last one is probably the most likely to happen...
It feels to me like they are starting with a basis in the Continuum Concept, which was a book from a thesis written by a childfree graduate student who studied a native culture in South America. The concept that people who read the book have come up with is called "benign neglect", but trust me, it has NOTHING to do with actual neglect. It has to do with...instead of sitting there "playing" with your child for hours on end, you engage in the normal everyday living aspects, with your child around. So you do the dishes while baby bangs pots and pans (I never did that with DS, ears are too sensitive, and ultimately b/c of his personality he jsut wasn't allowed in the kitchen anymore), you do laundry with baby on your back, etc etc. It comes from the idea that the tribal people *have to* do their daily work or they don't eat/drink, and they don't have time to play directly with the kids, and the kids need to learn the work as well, so the kids play and engage around the work of the tribe.
However, if that's where they started, they've gone off the deep end and need to be pulled back.
I'm very glad your brother listened to your mom about the leaving him alone thing. I think that was a good place to start, and hopefully they really *got* that their actions have been wrong and they will strive to change.
Parking lot what ifs...
What if a car I thought was parked actually has a very short driver in it and backs up before I can get there (I've recently seen a car start moving when I thought it was empty...short person and tall seat...)?
What if there's broken glass in the parking lot?
What if there's a used syringe in this parking lot?
Something from our old apt complex grassy area...what if there's a used prophylactic device that my son is going to reach for?
Another crib what if...
What if this child is like Molly's husband, who could climb out of his crib at 9 months old and HIDE? It's possible that MIL's two heart attacks in her 60s were delayed reactions to how she felt when she came to check up on her precocious son that first time he did that...
As for letting him have free reign at the party, that's just a bonafide way to not get invited back! People who invite kids to parties are lovely people, and need to have lovely children (or at least involved parents) show up. Not wandering, alone children who are exploring. It's just not appropriate.
Bowl of punch or bowl of hot soup spilled onto baby as baby explores the tablecloth from underneath the table. Knives, forks, etc spilling down around him. Etc etc.
Perhaps you should find a copy of The Worst Case Scenario Survival Handbook, to kind of rev up their normal responses that seem to have become dulled?
If they really can't handle keeping him safe, I'm sure there are plenty of people who would be more than happy to continue to wear him, give him organic food, and use cloth dipes on him, and I'm sure they would give his loving family access, too. I'm sure we would do all of the above, and that there are more like us, if his parents decide that keeping the little dude from harm is just too much for them.
I hope that child is placed with a loving foster family. Not to be mean, but none of you are capable of giving that child proper care. Nobody has cared enough to report the parents.
The family seems caring. They didn't just sit back and let the baby roam. They took care of the baby, and got the matriarch of the family to talk to her child, a *long* talk it was reported, and hopefully that will show them the errors of their ways. If a family is willing to do that, that's a good thing, and it doesn't mean that they aren't capable of caring for the baby if it came to that. My goodness. It's wonderful that the family stepped in in this truly bad situation.