To get back to the OP, here is another link about the situation:
State Threatens to Shut Down Nutrition Blogger
I believe that the issue is thus: in North Carolina, a person cannot open an office in a shopping mall, for instance, and hang a shingle stating that he or she is a medical doctor if they are not, in fact, a medical doctor. Indeed, most (if not all) states have such laws about practicing medicine without a license.
In North Carolina, they also have such a law concerning dispensing diet and nutritional advice. You cannot, apparently, open a physical store and call yourself a diet/nutritian specialist.
Here, we do not have a physical store. Instead, Mr. Cooksey began a website that not only promotes his own personal diet (or a diet devised by someone else), but, if the facts above be true, would respond to questions from strangers with advice concerning diet, diagnostic tests, what said tests mean, and how to 'cure' diabetes.
Mind: I am not saying that I agree with this North Carolina board that is making the threat of suing or bringing charges.
However, Mr. Cooksey certainly drew the boards' attention to himself when he went to that Seminar and passed out cards directing people to his website.
I can see Mr. Cooksey's point of view. However, I can also see the NC Boards point of view. I guess that the good people of North Carolina like such rules concerning licensing of nutritionists, etc.