Hi! I can't really comment on SoCal drivers as to their attatude, I live Here, ...Not there. but "Drivers" everywhere are ridin' around in steel cages and they CAN NOT SEE YOU!
Believe it or not, you are invisible to them, therefore, use the power you'll have on your Ninja to ride just aggresivly as you need to be to stay in front of them or at least out of their blind spot.
Install a headlight modulater for the benifit of those comming at you, and for Cripes sakes, don't do like all those other ninja riders around here and ride around with shorts a tank top and flip flops with only a back pack on.
Don't act the fool by doin' wheelies and headies and **** going down the boulivard. That stuff is for stunt riders and TV & movies. Not real people. Else, you'll be making payments on a pile of scrunched scrap plastic and aluminum in your garage, with one or more of your limbs broke off just where it comes out of your body.
GET some freakin' street riding personal protective gear thats worth a dang , I mean, dress out like a freakin' transformer in the cartoons.
Don't mean to scare you, ...really.
Have a nice day!