I noticed them when I was there last week but only because I had just read an article in the paper about the installation.
Most good twisty roads in Cali either have the rumble strip, the double-yellow that is made entirely with the round/raised plastic pods (no paint), the raised plastic reflectors (and paint), or the subgrade reflectors. In all cases, crossing the double-yellow while leaning is a risky proposition.
Playing devils advocate, if you think this road is even more dangerous than before, and it might be, then maybe you should stay off it. [lame answer and easier said than done, I know] Although most of us like to go for a spirited ride on our sportbikes, our roads are really not intended for this.
Are most of the head-on collisions that take place on Polomar the result of fast driving/riding or the result of people falling asleep behind the wheel or driving drunk or something? If the latter, maybe this WILL help.
In any event, it sounds like on a bike you better keep it in your lane while turning or else. It also sounds like some people feel that the chance of someone lowsiding into them is now higher because of the rumble strips. If you can't live with that risk, don't ride the road.
Instead of rumble strips, what should they have done?
In a right hand turn, you shouldn't be anywhere near the double yellow once the turn has started.
GENERALLY, I'm damn near the yellow line on my right hand turns for 50+ percent of the turn....late apexing in an attempt to run a defensive line. But I still agree with the actual point you were making.