Unfortunately it’s unlikely for this to be implemented in a privacy-respecting way. Arguably, even if it never “phones home”, it’s always going to be a more risky option—e.g. police can seize the glasses and see who you’ve seen, whereas they can’t seize your brain and see what faces you’ve seen. You might be fine with that risk, but will everyone you ever meet be fine with it?
Unfortunately it’s unlikely for this to be implemented in a privacy-respecting way. Arguably, even if it never “phones home”, it’s always going to be a more risky option—e.g. police can seize the glasses and see who you’ve seen, whereas they can’t seize your brain and see what faces you’ve seen. You might be fine with that risk, but will everyone you ever meet be fine with it?