The advice in the link says “rules”, not laws.
They are therefore advice. In Australia we likewise have all kinds of rules, that, when you drill down, cannot be backed by law.
The link in the article to the laws:
... leads to a can of worms I won’t get into as I’m not even in US. But Brett8883 did mention that it wasn’t against “the law”. Be interested to see if either of you can point out the reason “in law”. Personally, I like laws. Rules on the other hand are made to be broken. Rules are often created by freedom-sucking nanny-state entities when a law can’t be passed. Then people start to follow the new rule, then all of a sudden it’s passed into law! Not always a bad thing, but should always be questioned, no matter where you live.
Now be nice. I’m just interested in the US laws. Not insults or ethics, safety or advisable. Cut and dried is it illegal or not?