This is what they do in Mexico when entering the country from the perspective of flipping a coin. I took my vacation in Maya Riveria and upon entering the count

This is what they do in Mexico when entering the country from the perspective of flipping a coin. I took my vacation in Maya Riveria and upon entering the country they have a box with a button. You push the button and it lights up green or red. Green means you go, red means you have some additional security checks.