A garden variety capacitive sensor can't tell the difference between a human finger and a hot dog. How do you propose it would beyond attempting to measure the

A garden variety capacitive sensor can't tell the difference between a human finger and a hot dog. How do you propose it would beyond attempting to measure the amount of capacitance and mapping it to an accepted band? Attempting that is way too fragile a solution due to variability in humans and local weather conditions. And even if you did put in the effort for that, an attacker could still fairly easily match the dead finger capacitance to the correct band pretty easily.