(Funnily you have to register with your RUT (equivalent to the social security number) when entering free, public parks or other random places.)
Of course, but by "from scratch" I mean without the original key. Something within the realm of a professional locksmith, rather than the newest 16-year-old employee of the local hardware store.
When I had these holograms made, I was required to write a letter to state my legal claim to even use all of the words and images that went into the logo (such as Casascius, the BTC logo, etc.). For example I had to explain in writing that the BTC logo belonged to an open-source project, that its original author had released it into the public domain (including prints of the forum posts where it was released) and a good-faith assertion that my use of the mark was rightful. Making holograms requires a much more coordinated effort and high-value assets than duplicating keys, requires a pretty big budget even if you're NOT copying something fraudulently, and sending someone the holograms and saying "can you copy this, hopefully on the cheap" likely won't get anyone very far unless they are very cozy with the people making them.
Other mechanisms for hologram manufacturers are in place to prevent counterfeiting as well, the hologram can be registered on a worldwide database that legit hologram manufacturers will not copy from. So that leaves few avenues for copying the hologram design. Also Mike MAY have other safety mechanisms in place but in order to keep them valid can't disclose them, you never know...