I'm not real knowledgeable about this tax stuff, so I may be way off base, but couldn't all those M&Ps just quit doing business in California?
They don't do business in CA. They sell their products on Amazon, and Amazon warehouses some of it in CA. So the CA shakedown artists at the tax office are trying to say that this means they are doing business in CA.
It's crap and just one more reason why we should kick that crap state out of our union.