"...why anyone hasnt done anything about NSS salons i.e shut them down?..."
It's harder than it sounds. In some places there just aren't sufficient laws, and where the laws are adequate, nowhere near enough inspectors to enforce them. It's like trying to stop the incoming tide with a bucket and shovel.
As has been pointed out earlier in the thread, even when NSS are shut down, they often reopen quickly under another name/license. Even when NSS are put out of business by lawsuits (for example, in the epidemic of horrible leg lesions in California, from filthy footspas), someone else will take up the slack when one goes out of business. It's like trying to control drug dealers (or coyotes) -- bust one, another takes over his territory right away. The niche, the habitat, is immediately refilled, because customers (or food) are there.
So the only people who can shut down the NSS are the customers. Here the problem is education. Many customers just do not know any better; they don't know it's not supposed to hurt, that rings of fire are wrong, that shaving calluses is wrong, etc. Most of all, they don't know that your place down the road is using cleaner tools, safer products, and less damaging techniques -- they only see the higher price in the window and never inquire further.
They just assume it's all the same, so they go for cost. They're not stupid, they just lack information.
Eventually some of them get tired of getting hurt or infected by NSS, and they give up. I've lost count of how many people have told me, upon learning where I work,
"Oh, I used to get my nails done... it hurt... I'll never do it again..." When I examine them I invariably see rings of fire or other evidence of damage (unless they quit so long ago it's all grown out). When I tell them it wasn't supposed to be this way, they are quite surprised. But, of course, they've sworn off nails and I don't think I've ever convinced one to try again. The point:
Due to the damage done by the NSS, these customers are lost to the whole industry forever. They won't go back to the NSS, and they won't go to your good salon either.
So...we need to educate the customer. To this end, the Nail Manufacturers Council (NMC) has prepared a brocure, "What to Look Out for in a Nail Salon", which you can get here:
English
http://www.probeauty.org/about/committees/nmc/docs/WhatToLookNailSalon.pdf
Vietnamese
http://www.probeauty.org/about/committees/nmc/docs/WhatToLookNailSalon_VI.pdf
Spanish
http://www.probeauty.org/about/committees/nmc/docs/WhatToLookNailSalon_ES.pdf
Korean
http://www.probeauty.org/about/committees/nmc/docs/WhatToLookNailSalon_KO.pdf
Feel free to print it out and pass it around to customers or prospective customers. Also feel free to browse the other info we have on our site:
Professional Beauty Association :: Nail Manufacturers Council
Hope this information is helpful to you.
Paul