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@GA2G
The original idea for security is interesting. It reminded me of the **Zefal Lock-n-Roll **solution, which required re-orienting the bike from horizontal to vertical for the locking pins to release. Not the same, but the comparison can be made. I can't ever pretend to be an engineer, but for anyone to think that in removing mass from an object, that its strength is unaffected, is not being honest with themselves. Of course, how much mass is removed, and where it is removed from, will ultimately affect total rigidity.
Since track cyclists can snap cranks, could not the forces generated by very strong cyclists, or very heavy people, not cause enough stress to eventually cause failure? I think its an idea that should be explored not just from a conceptual view, but with mechanical testing. OP, why not work with a company to develop it? Drilling a hole won't cost much; its the testing that will.
I am sceptical of its safety, but as an original idea, its not a bad one. I'm heavy, so I would never use it though.