I'll provisionally agree that enough people could buy into regulatory information assuming it's useful enough. I'll even allow that it's not corrupted (though I have written a paragraph below on why I believe this wouldn't be the case). I'll allow that the regulators are able to discover who own the company above a protection firm all the way to the top. I'll allow that people will actively switch between companies to stop a local monopoly forming (though I've written another paragraph below saying why this might not be true). Is there any way you can stop an investor buying up all the competition in a small region at a price above market value for a competitive market and below market value if you had a monopoly and were willing to abuse it?
Ignore the next two paragraphs if you want as they're the ones referred to earlier: I don't know that the regulators aren't in bed with the regulated in the public system. I do know that if people care about it enough they can effect the regulators. I believe it's easier for the regulators in a free market system to get in bed with the regulated because those most motivated in regulating a specific industry are those within the industry itself.
You may believe it's obvious that consumers will switch to the better option in the market but the vast majority don't because the majority of people can't pay attention to everything they spend money on all the time. If you look up the “What's my number” campaign in New Zealand you'll see that simply reminding people they could change electricity providers and giving them an easy way to compare them hugely increased switch overs. The point being in this protection market which would be a service you just pay every other month would be something to easily forget about until it's to late. Even given advertising by concerned parties how do I trust advertising anymore when there's no one regulating it, I could put out an advert saying I'm the official spokesperson for a company and what would be the consequence?
My last paragraph was admittedly a quick example without explaining the reasoning behind it. I'll explain my reasoning now. You say that protection and laws will be decided by what protection company you subscribe to. You obviously don't have a system outside these providers to enforce other laws except market forces.
These providers can decide what services they offer. One of these services will obviously be protection from theft. i.e. If I stole from you your protection service will take action against me in some form.
What is the incentive for your provider to not offer varying plans that we find socially objectionable but say 5% of society is ok with. i.e. Plan A we imprison the perpetrator for these crimes. Plan B we cut off their hands for these crimes. Plan C (our platnium package) we shoot the guy for any crime against you. Plan D (our cheapest) we take the perpetrator to a work camp were he works off his debt to you. (Plan D is at a work camp were room and board costs more than what we pay the perpetrator). These providers also offer lower penalties i.e. no work camp penalty to those who are customers.
So obviously the next step is your provider comes up with a set of rules that limit what other providers can do to you without some form of retribution. What form of retribution is this? Is it a financial penalty? If so how do I stop a rich man from saying I'll double the cost of the penalty just get rid of this man. If it's physical retribution does that mean we accept people being beaten up in the street by the protection providers as part of our daily lives?
Let's say one provider has imprisonment as a penalty, why would I pay more for a provider that offers the same service but there prison is nicer that the alternative provider. Unless say the providers have a reciprocal agreement were they place their own customers in their own prison, which of course means the rich get to live in a country club for the duration of their sentence and the poor get whatever they can afford.
Finally the fact that everyone can afford a provider. While I do not agree that everyone will be able to afford a provider and there won't be any homeless who can't be preyed on with impunity, or that there are no poor that can't afford health insurance (sorry I meant protection) we'll ignore that. Instead consider what happens if for the sake of argument I forget my payment one month or I'm outside of my protection services city/village. Am I suddenly no longer protected and subject to others whims? Are there roaming fees for protection? If it's a sunday night and I need to drive to the other side of the country to get to my dieing mum am I able to be beaten up at any gas station along the way with no penalties for the offender, and possibly penalties for me if I fight back?
Assuming we surmount these regional justice issues and we also get a system were the providers effectively offer an equivalent and fair level of 'justice' no matter who you subscribe with how do you stop one growing on the basis of being the most efficient and then leveraging economies of scale to get into a monopoly position. When the monopoly is established how do you expect a new upstart in the region to be able to get a reciprocal 'justice' agreement with the monopoly when from a business point of view it is better to not have the competition.