As stupid as those rules are, if the home owner knew about them when he moved into the neighborhood, he should have known what would happen. Most neighborhoods like that have covenants that are made available to the buyer by his real estate agent or by the seller's agent.
Does he also live in a gated community? If so, he really just didn't pay any attention.
If you don't want to become part of the Stepford Wives culture, you have to carefully know what you are buying and whether there are rules governing atrocious things like hanging your laundry out in the back yard. Horrors!! One of the neighbors might see your underwear!!
If you don't keep your garage door closed, it could cause undue aesthetic stress on the neighbors.
If your house isn't a certain number of square feet, you simply don't fit in with the rest of the neighbors and should go find a place that isn't in such a nice neighborhood.
It's one reason I no longer sell real estate. I got so sick of finding just the right master bedroom in just the right enormous McMansion for childless yuppies that I started to gag.
The older I get, the less patience I have for that kind of elitism. I'm becoming a regular curmudgeon!

But with a smile.