[lurker456]

If your password is leaked, then you can still reset it. If your fingerprint signature leaks, you're out of options.

[why_only_15]

Burn your fingers!

[red_admiral]

This may be an urban legend, but I've heard there was once a bank robber who dipped his fingertips in acid. After a few months, his fingers healed, and the prints were exactly the same as before.