Prop 65 warnings are pretty useless though, since they have very limited information that does not allow one to evaluate the risk incurred.
Case in point, my first internship in California was in a building with a sign that said "This building contains chemicals known to the state of California to cause cancer and birth defects or other reproductive harm." What's in the building? Who knows. Could be really bad chemicals, or just someone who has a beer on their desk [0].
It would be much better to have some information about the chemicals contained, how bad are the chemicals, and what is the expected effect of the chemicals at the concentration at which they're encountered.