There are constitutional rights. They are clear. Opening an unregulated business is not one of them.
Really? You do know that there is no constitutional right regarding parenthood, right? So I guess it is OK in your eyes for the government to do whatever it wishes?
I am curious. Do you think cities and states have the right to tell you how fast you can drive, or whether or not you have to stop at an intersection, or whether or not a 10 year old can drive a car?
I believe the government has a right to provide physical protection for citizens, when that protection does not violate the right of choice for all endangered parties.
Example: creating a speed limit and traffic laws are permissible, since all parties of the action have not consented. If I am speeding through town, I am posing an immediate threat to others, without their consent.
However, if I and another individual engage in a sale, where both parties consent to the terms, the government has no right to interfere. This is so clear, it seems ludicrous that any right minded individual would argue the point.
Do we really want a state where I have to carry my own scales to the supermarket? Do we want a state where a store can call something a bag of flour and mix it with chalk dust?
Boy, I sure do! Chalk dust not withstanding (since chalk is in fact dangerous in large amounts, and thus would be a criminal action, not a commercial one). The fact is, in a free market this would never happen. People would quickly find out about the contaminants in the flour (through private businesses such as consumer reports, BBB, etc.), and they would do business elsewhere. People would also be able to buy the products much cheaper, and in many cases healthier (since many of the FDA's guidelines are completely non-sensical and contrary to good health practices).
Is it truly tyranny to tell me I must stop at a red light?
Again, this is a situation where possible harm is being threatened against non-consenting individuals. Since you are in favor of the government regulating things, even in the case of mutual consent, I guess they should outlaw dirt bike riding, mountain climbing, and jet skiing. After all, the government must protect everyone, even if it is against there will, right?