The irony of threads like this, is that when people that are without law degrees that rattle off this is/isn't allowed on whatever law is dangerously close to be violating the law as well. Whether or not what they say is correct.
Professions such as Law and Medical have very strict rules and regulations over such things due to the "intimate" nature of those professions. Now with the internet, there is some room to scratch and burp with regard to what you say until things catch up, as most people see the internet as a place that people still have to vet the information they read very carefully. As the internet is steadly becoming the first place people go for information(if it isn't already there by now) that'll change for sure.
But if you were to go up to someone during a "physical" conversation and say this or that is or isn't allowed under the law. You could be sued. Or if you say to someone, sounds like your kid is sick or sounds like you are sick, you could be sued unless you have certain letters after your name.
Case in point, I knew a barn manager that told a boarder at his barn that it looked like her horse was lame. She sued and won. The claim was giving medical(in this case vet.) advice without a license. Now, you might be thinking why as that seems to be kinda harch reaction. They were on the outs and I think she was especially wanting to get something to stick it to him. Not many people have evoked that law in my experience, but it's still on the books and that's all that matters. I don't know what he does now, but he doesn't manage that barn anymore. I've done it numerous times with boarders at my barn, still do. After so many years you pick up on that just by experience, but it is still against the law. As it is in TN anyway.
That's just another irony, that isn't far off from the irony that DanStriker mentions. It's because of what Dan finds ironic is why we have rules and regulations for certain professions. Regardless of whether or not they offender is correct.