WOW! This was a really interesting read. I don't even know exactly where to start. I never looked into G+ (and was nowhere near as good as a programmer as I am now), but those were really cool findings.
Related to UUIDs, it does indeed protect privacy and protects the server from crapping and leaks. It is not enough for security, but it does make it harder. Internally you can still use sequential IDs for the PK so that speed is not impacted.
Related to UUIDs, it does indeed protect privacy and protects the server from crapping and leaks. It is not enough for security, but it does make it harder. Internally you can still use sequential IDs for the PK so that speed is not impacted.