This is all really interesting. I don't generally use names, but specify relationship, like "my friend," "my brother," etc. only because the names seem irrelevant. But I've always used my real name and address because it was required either to be eligible for services or insurance. I've always declined to list an emergency contact with all providers, medical or otherwise. They try to make you give a name, especially medical providers, but I always just say that I decline and leave it blank. Nobody's ever refused to treat me, even for surgery.

But my understanding for Ts in private practice is that if they treat you knowing that you are giving a false name and address, they could be risking their license in the event that you become involved in any harm situation to self or others. Now, if you give a false name and address, and are paying cash, and you just present the info as true, they are protected from any consequences. I've always assumed it was sort of like a lawyer, being an officer of the Court, can't knowingly support false info; but as long as the lawyer doesn't have reason to believe the info is false, there's no jeopardy.

I would never give a T info specific enough to report anyone over my objections.