You’re not actually giving the website access to your fingerprint or other biometric information by doing that. That’s all handled on your device which then sends a verification message.

There is a huge diversity of plastics being produced today and each one will require a unique evolutionary adaptation to be biodegraded. We’re also continuously developing new plastics and new combinations of plastics such as core-shell polymers. You also had much more wood available than you have plastic scattered across the earth, meaning much more energy available for any microorganisms that evolved to degrade wood and thus a greater evolutionary advantage. I don’t think microbes are going to save us from the plastic scourge anytime soon.