This is one of "those things" to me I guess. But bottled water and cable tv were too. crazy!I double checked and here is what one link said:
"Meanwhile, of the 12 States that do have laws, none of them prohibit the practice, only regulate it. Those states are Arizona, Colorado, Illinois, North Carolina, Ohio, Oklahoma, Oregon, Rhode Island, Texas, Utah, Virginia, and Washington."
This is a better link because it details every State's Regs....so why not exactly illegal, many have to be permitted and/licensed, which makes me wonder what if yours...isn't? Where I used to live if you didn't have a permit and did it...it was illegal.