I'm actually very curious about that sort of thing which is why I find A particularly interesting. My assumption is that Google would just avoid the headache al

I'm actually very curious about that sort of thing which is why I find A particularly interesting. My assumption is that Google would just avoid the headache altogether, but one of the rarely spoken truths about teaching physical security is that your students may have malicious intent. You apply whatever social screening you can, but at the end of the day, bad people exist and some pass pretty well for good people. When doing a proper lockout I can take IDs, have people sign things, etc. all of which have (in general, not in my personal experience) failed on one level or another and the modern history of locksmithing is rife with tragic stories of locksmiths unwittingly helping absolutely terrible people. Some means of identification/authentication would certainly be possible with Helpers, but again, I cannot imagine Google would engage in the headache of adding that layer.