texas1968, knkansas, and devcamsie all have good points. 
 
Parents are a child's first teachers. The child will learn how to cope with life based mostly on how the parent approaches the child.  
 
If the parent emulates childlike behavior, then it will probably teach them that this kind of behavior is acceptable (or they might rebel against it, and perhaps try to grow up too fast, but this is less likely).  
 
Homeschooling is not a bad thing. If I recall one episode of Dr. Phil when he touched on this subject (I think the mother wanted the home schooling while the father didn't--he had all the stereotypical fears in addition to thinking "the child would turn gay"), Dr. Phil stated that homeschooling is not a bad thing, as long as you are willing to add in extra-curricular activities of SOME KIND to allow them to socialize--what they do not have in the homeschool environment.  
 
However, if what texas1968 states is true--that these mothers are overprotecting their children, then they have as selfish of motivations as Darcy did from 03/02/2006 (yesterday's) show: instead of acting on the child's best interest, they're acting on their own emotions. In Darcy's case, it was guilt, but in these parents' case, it's anxiety: anxiety from their children being exposed to the cruelties of reality. Sheltering children from reality actually makes them MORE VULNERABLE because they don't have the necessary coping skills it takes to handle situations like those of us that are exposed to it and come up with ways of coping (whether some of these ways we use are healthy or not is anyone's guess...) 
 
Although I should elaborate on Luccib's point a bit: 
 
It IS everyone's business what you do with your child - you are living in a town, you are part of a neighborhood, your child attends a school with other kids - it's not about outdoing your neighbor or giving the child what you never had. Sometimes the less you give them and the more you expect from them the more successful they'll be. Don't be afraid to say no - they love you anyway...and I speak from experience.  
 
Is it really everyone's business? I would say so if their behavior is detrimental to the public eye and disrupts the lives of those around them. Sure, we all want to be right-fighters here, but we can't save the world.  
 
...or maybe I've been taught that interfering in someone else's business is rude. Perhaps that's completely false? Perhaps there's a tactful way to do it? The reason I ponder this is because I do know a few individuals that I question the way they raise their children. However, I haven't raised children myself (in fact, I've just recovered from a lot of my own maturity problems!), so that fact will always be used against me, despite my good intentions. Perhaps it's best to butt out and let the professionals (such as Dr. Phil) handle this? Perhaps there are no professionals in these individuals' lives that could give them a wake-up call?