Lead contamination is a bit of a crusade of mine. I'm always frustrated when the topic comes up. People will object to any proposed improvement by saying "I've been doing <XYZ> for 40 years and it hasn't killed me yet!"
Yeah, it hasn't killed you, but how do you know you're not 10 IQ points dumber than you could have been?
Yeah, it hasn't killed you, but how do you know you're not 10 IQ points dumber than you could have been?