This is interesting and how often have I seen it posted or asked. But, given that it was in the LA area, I thought it a GOOD question!
I've not been to LA nor do I even care to go. However, I have been in San Deigo and those folks don't smile! LOL! So, to me..........it was an legit question on the OP's part.
My daughter told me upon arriving, "Mom, you aren't in North Florida anymore. Don't smile, grin, or be friendly or they will think you a crazy weirdo." I thought she was just joking. When I was at the cash register to check out the cashier was about the rudest person I have ever come across. I looked at the bag girl with the look that said, "What's the deal with her?" The girl smiled (just like she had read my mind) and said, "Welcome to San Deigo." I grinned and said, "WHY THANK YOU!" and then whispered, "You aren't from here are you?" She laughed and said, "Oh no. I'm from Tennessee." And I grinned and said, "Hi neighbor and thanks for the welcome." I looked back at the cashier who looked like she had a corn cob up her butt and said, "Thank you and I hope your day.........and your life looks up for you soon." She had even a more soured look and the Tennessee gal went into fits of laughter.
My daughter only shook her head and said, "Mom, please behave." LOL! I didn't do anything!
Good luck to you high jinx, hopefully you will find a transplant. Heh, heh, heh.