I suppose it's a matter of chance whether or not a person carrying a fixed-blade in CA encounters a negative reaction. I've been openly carrying a fixed-blade everyday here in urban San Diego since 2004 (I carried periodically prior to that), and I have never noticed a negative reaction. Of course, I don't look for negative reactions so it's possible that they have happened and I was completely ignorant of them. Either way I couldn't care less. I have also seen several other people carrying fixed-blades, so it's not exactly unheard of.
To give you a good picture, I've been a die-hard biker for the past 27 years, I look like a biker (scruffy, lots of ragged black leather), and the fixed-blade I carry is all black and has a 5" blade (Wilson Tactical model 25).
I carry my knife wherever it is legal to do so. I carry in stores, restaurants, and all manner of public places. No one has ever called the cops on me or asked me to leave their business or property.
I have received four comments from people over the years-
1. I sometimes used to carry the Wilson hanging upside-down from my belt in a kydex sheath and a guy standing in line in a Taco Bell said "Excuse me, but what keeps the knife from falling out?". I responded by explaining how kydex sheaths work.
2. A kid (maybe 12) at a 7/11 asked me why I was carrying a knife. I told him "To cut stuff."
3. I used to sometimes carry an Entrek Cobra fixed-blade in a back pocket sheath. One day a guy in a car pulled up next to me at a red light and said "Hey buddy, do you know that you've got a knife in your pocket?". He thought that maybe I stuck it in my pocket and forgot it was there.
4. Another guy in a car asked "Hey buddy, what's the knife for, lawyers and tax collectors?". He was joking, I just smiled at him.
Many cops have seen me carrying the Wilson 25 over the years. On one occasion, I walked into a fast food joint and there was a table of about six cops having a meal. I stood right in front of them at the counter placing my order, then waiting for my food, with my knife in full view of the cops, and not one said a word about it.
Only once did a cop ever say a word about a fixed-blade I was carrying. And all he did was warn me that my jacket was covering the handle of the Entrek in my back pocket, thereby making it "concealed" (this was an accidental occurrence). Despite my appearance, and despite the fact that technically the cop had me for carrying a concealed fixed-blade, he didn't take the knife, or ask for the knife, or even ask for my ID. All he did was give me a friendly heads-up and say that he didn't want me to get in trouble with some other cop. I adjusted my jacket to expose the knife, the cop was happy, I thanked him, and we went our separate ways.
I say, enjoy the great knife rights that CA law provides you, and ignore those who don't like it. We here in the US have knife rights that many people in other countries can only envy. To deny oneself the freedom of choice that this country offers for fear of what total strangers might think is no way to live in my opinion.