Nope. You're registering the drone. If you have 2 or more drones, each has it's own registration number just like airplanes have different N numbers.
In Missouri, they setup road checks. 2 or more highway patrol will stop all cars and trucks and check license and registration. I work for MODOT and got stopped and checked once. No probable cause, just a random stop.
When you fly an airplane, a LEO has every right to ask to see your pilots license. I figure it's the same with flying a drone. I'm guessing each state may have it's own laws independent of the FAAs.
I've got a friend that works for the HWP. I'll have to ask him. Last I read Missouri hasn't written any drone laws, but that doesn't mean a city hasn't. We're supposed to obey the laws, but how to keep track of them is the problem.
As for loosing our freedom, we already have. I'm a land owner, DNR has told me I can't cut down trees in the middle of my soybean field because it holds water. That makes it a wet land. The animals living in that 1 acre have more rights to my land than I do. Constitution says we can own land. The government through the DNR. Has taken away our rights and dictates what we can and can't do with our land. Ever since the civil war our government has slowly been taking our rights away. Before that time, they were concerned with ensuring our freedom.
Sorry for the long off topic ramble. But it does kinda go along with the topic of our freedom.
Also, I'll have to double check, but I was thinking when I studied for the FAA test, it said the registration number had to be on the drone where it could be accessed with out tools. I took it to mean on the drone itself. A call to your local FSDO might clear up this question, but I'm thinking the battery wasn't legal because it can be removed, then there won't be a number on the drone.