The concept of "grandfathering" rule breakers has always seemed like naked corruption to me. OK, we think this thing is so bad, that we're passing a law to ban it, BUT everyone who was already doing this bad thing can keep doing it forever because... because... because putting an existing company out of business is apparently the worst thing in the world. If our elected officials think something is bad enough to ban outright, then it should go whole hog and actually ban it. Not just prevent upstart competitors to existing legacy industry.