If they don’t have an age signal they won’t be able to access social media or Youtube.

They won’t be deciding to just do without California.

That’s not what they asked

Wrong. That is all that is asked in the Californian legislation.

You don’t need ID to buy a sim in the US or UK, or most countries in fact. Most sims in Australia are pre-paid, not contract.

To get a sim card in Australia you need to show identification. There is no anonymity.

The only reason computers had a black background was with picture tubes the flyback signal would trigger if the luminesce level was high causing the picture to roll.

Once they’d fixed that (eg MacIntosh), they went back to white.