The labeling requirements are supported by the American Cancer Society and the National Cancer Institute

I’m surprised! I believe the ubiquity of Prop 65 warnings have desensitized us to them when they might really matter, if somehow they needed to be posted only when there was a greater need. Like I believe if you just roast a bean, you need to warn customers - like Starbucks:

I will say I’m almost positive a national company has removed something bad from their product/packaging to avoid being forced to put a scary sticker on that would be seen by buyers nationwide. Hopefully it’s not a BPA situation where the replacement material is alleged to be worse than the original one.

Disney's delegitimatizing sign should be expected because they are a soul stealing corporation, not your funny friend making this sign to troll the overbearing government.

Do you mean to say you believe Disney decided to post an optional sign? (Can’t tell exactly but think that’s what you’re getting at.)

For the record, I believe this is not the case. Something like brass railings could necessitate the warning.

Little further reading:

Proposition 65 warnings now greet guests at Disneyland, drivers at California parking garages, visitors at hotels, shoppers at car dealerships and lunchgoers in fast-food lines.

Source article is critical overall:

More than three decades into California’s right-to-know revolution, consumers today don’t know much about the health risks posed by consumer goods. It’s nearly impossible to tell whether to put down a product bearing a warning and choose one without it — either one may present a high risk, a low risk or no risk.