I have serious reservations about sticking that number to my drones. What's stopping anyone with bad intentions from copying your number, putting on their drone, then doing something illegal! I'm not putting myself in that position. The FAA needs to seriously rethink their policys!
I agree, its a double edged sword, on one hand, having the number means if your craft flies away theres a chance that if someone else finds it, they can trace it and get it back to you. On the other, if your craft ends up somewhere it's not supposed to be , they can trace it and hit you with serious fines. And if someone copies your number and puts on their craft, then you may get in trouble there too. But lets say someone does do that and gets caught while flying, that number wont match their identity, now they are in some deep doo. And if you get caught flying a registered UAV without it being labeled in some fashion then you got problems. That's why i put mine inside the battery compartment. If the "authorities" want to check me out, I am legal. And unless someone goes inside the battery compartment, they cant copy my number.
It seems there's a good and bad side to everything. Drones are great, they have many really cool, positive and productive uses, but they can and will be used for really terrible things. Hopefully we will all be able to keep are heads on right when these situations present themselves. Make no mistake UAV's are here to stay, the only question is will WE be able to fly anywhere after the dust settles?