I didn't ask about ID check. You make it sound like the process involves just walking in and asking for a ballot. I actually don't recall the detail from this cycle as to whether I was asked for ID. They did check out whether I was on the list and had already checked in. So they did look whether my name and address was registered to vote.
In my case there was no such identification process whatsoever. I went in, asked for a ballot, got a ballot no questions asked, filled it in, and dropped it in a box monitored by a few poll workers.
I actually asked them the first time I voted if they weren't going to ask me who I am because I found it bizarre, and I still remember getting a simple and quick "No.".
So I really don't know what to tell you, I can only relate what I experienced. I have no confidence that California's elections are worth a damn because I have nothing to support such an assertion.