I don't think you understand the reason why people are going "off-grid" in the first place. Systems of dependency can and will fail you. What happens when the grid fails, for whatever reason? The public sanitation dept. have no redundancy to guarantee the very things you just mentioned in the post won't happen. I'm originally from Wisconsin, USA. A smaller town in the north, Rhinelander experienced failures in just one pump in their sewage system and it contaminated over 5,000 homes that had to be expensively sanitized before the owners could get occupancy again. So, depending on power to always be available isn't a guaranteed strategy to avoid nasty diseases that untreated human waste can possess.

Composting toilets, however, are very sanitary. In fact, they accomplish the very same process that ALL public sanitation systems do. They efficiently break down human waste through heat and Ultra Violet light exposure and then return the surplus nutrients back to the soil. Do some investigating into where the "sanitized" waste goes when the sanitation departments are done with it. You'll find that it goes into your rivers and onto your farm fields. Off-griders are just cutting out the middle man and doing it them self so that they are not dependent on outside systems of support.

As for your point of Child Protective Services being called on families who choose to be self-sufficient and safely recycle their own waste, what proof do you have of that ever being done? If that was the case, all children in all underdeveloped countries would have to be taken away from their families since most of these third world nations don't even utilize composting technology. I've been to Juarez, Mexico where raw sewage is running in the ditches. It's a city of a population over 1 million people, the vast majority without indoor plumbing. Missionary agencies are actually teaching the people of Juarez to install and use composting toilets.

So, I don't understand your animosity towards those who would like to go "off-grid." I personally am on-grid, but have a composting toilet on the standby in case power ever goes out for longer than I have fuel to run my generator.

Cheers mate!