Here’s the thing … the law sounds bad until you realize how shitty some religious/conservative parents are. They’ll forbid their kids to speak to their doctor about birth-control issues, then act all surprised, horrified, and Pope-holy when their kid ends up pregnant. And instead of allowing an abortion, they’ll saddle their kids with a child at 16 and kick them out of the house. Would you rather California went in the other direction like Alabama or Georgia, where basically no woman has autonomy over their body, even after 18?
I’m sure you’re a good parent, but what about parental abuse, sexual abuse, and rape? Should kids have to beg for their abusers’ consent before seeing a doctor or a shrink?
The flip-side of your “going postal” argument is that kids can actually seek counseling without their parents knowing what was said in confidence between child and therapist. Bonus points if California gets public health care in the next 5-10 years and psych services are subsidized or free for all residents, including those under 18. This will actually expand access to therapy, make therapy more effective (confidentiality is important), and do more towards your goal of preventing school violence than reducing autonomy would.
BTW, I saw your original post. Nice troll there, speedy.