It needs to be on the outside of the aircraft. Why does having a small label on the outside cause such uproar?
Plus if the powers to be want this to be law (and they do) it doesn't matter how many signatures are against it in the end it will remain law.
Let me answer that question and then explain....
It matters because it serves no real purpose and then could only be used against people, unfairly. It's like having the speed limit drop from 45mph to 10mph within a few feet. Unreasonable and serves no purpose. You could argue, simply slow down. But that is not the point.
To explain this...
The _only_ way this makes a difference is when there is not registration on the outside .
So a person needs to have flown illegally and the FAA now has the drone (which almost never happens... pretty much never). The person who flew the drone illegally and lost it puts there reg on the outside of the drone? Highly unlikely. But hey, it could happen. But problem solved. They should _still_ not remove the battery as this does not prove it is not a bomb.
So let's address the situation I first mentioned... drone flown illegally, obtained and no reg number on the outside. They then should treat it as a bomb. Eventually though, they will still need to remove the battery.
When you run though all of the situations, if a drone could be rigged to blow, they should _never_ just remove the battery and _ALWAYS_ treat it as a bomb. This is just a fact (according to the FAA's need for external reg numbers).
So... an external reg number _only_ helps when it is there and the FAA can match is up with a person and does not need to keep the drone or remove the battery.
How many times has the FAA even used the registration to match an illegally flown drone to the owner? NEVER! So this extra step is going to make some difference? Nope. What is _could_ actually do is result in fines to anyone who simply forgot to put the sticker on the outside or even if the sticker fell off.