The Bay Area still a Socialist stronghold, regrettably.
I see them here in the East Bay, too, typically in town like Lafayette, Walnut Creek, Alamo and Danville. I always want to see who has them and as a general observance, they are 50-60-70-something professional, or retired professional, women.
I saw some kooky lawyer in a 7-Series BMW and an old couple in Yukon last week, but for the most part, it’s the aged hippie women with curly short gray hair that sport Zer0’s stickers.