How can I deal with people who have taken pictures of me without my knowledge or consent? (California)

I, 22M, enjoy dressing in a more punk oriented style on a day to day basis. Just tonight, it was brought to my attention by my mother that my brother, 18M, who I go to the same college with, has friends who once took photos of me in my everyday punk attire and sent them to him to make fun of him. According to my mom, this has caused my brother a hefty amount of psychological pain. Considering that these photos were taken without my consent or knowledge that I was even being photographed, what kind of legal recourse do I have, and what steps do I need to take to secure that recourse?