I guess the questions I'd have regarding this that I'd need to validate would be:

- Does this setting persist across reboots?

- Does it stop phoning-home altogether, or will it still phone-home, but always authorize regardless of answer?

- Is there a more granular way to disable just phoning-home, rather than nuking all of Gatekeeper? (Some of its things like disallowing access to personal files by default are still nice to have)

Will report back with an update after testing...