It's pretty much having the same impact as California Prop 65, which requires warning signs about "chemicals known to the State of California to cause cancer an

It's pretty much having the same impact as California Prop 65, which requires warning signs about "chemicals known to the State of California to cause cancer and birth defects or other reproductive harm" to be displayed where ever you may come into contact with them. Of course, the state of "what the State of California knows" changes every few days, and there's no penalty for being proactive and posting your signs without actually verifying that one of the ~800 chemicals exists on your property. So every business just places a warning sign anyway, and consumers ignore the signs.