Can't speak from first-hand experience but I can recommend Burning the Table in Las Vegas by Andersen.
Great book he talks a lot about his fake IDs and his usage of them. I believe I remember him saying that doing this is not illegal to do in a casino. It is illegal to use a false name to get access to credit cards or to lie to the police about who you really are. I'm pretty sure he said that it is OK to lie to a casino about who you are because privacy and all that they basically do not have a right to know who you really are, but the authorities do. Hope that helps!
There have been cases prosecuted for this 100 percent - I would highly recommend staying away from doing that-
For machine play and getting free play on people that didn't exist. This I can see as a problem, even I don't think the people should have been prosecuted.
However, what I'm doing is nothing more than playing under an alias at blackjack. Again, this is why I'm asking for people who have done this with firsthand experience, or have friends who have done it.
"(casinos) do not have a right to know who you really are" doesn't mean you can lie to them. You can say "i ain't telling ya" but they can also say "go play somewhere else".
I can't imagine using a fake ID is not considered a crime.