Very easy to lose the features of those that tracking systems identify, however. Scar tissue makes most fingerprint systems fail over the smallest of changes, a

Very easy to lose the features of those that tracking systems identify, however. Scar tissue makes most fingerprint systems fail over the smallest of changes, and facial scarring is also, unfortunately, not an uncommon issue among the homeless. Ignoring the issue of device accessibility - which is the crux of the 2FA problem.