That's not entirely true. Power companies in some states can't refuse service, or they have to jump through a bunch of hoops to do so.
I had an ex who would go 6-9 months without paying her utility bill, simply because there was nothing the power company could do about it. She was abusing the system, but the rules are setup that way so that people who really can't afford to pay their bill don't freeze to death in the winter.
Look, power companies can cut power. Sure there are rules, but the point still stands that they can do it. But it's not even relevant because getting your power cut can affect your ability to remain alive.
Not posting on Facebook is not going to kill anyone.
I had an ex who would go 6-9 months without paying her utility bill, simply because there was nothing the power company could do about it. She was abusing the system, but the rules are setup that way so that people who really can't afford to pay their bill don't freeze to death in the winter.