After living in Silicon Valley for almost 20 years I have personally seen the rich of Silicon Valley at the following places:
The original pancake house Los Altos. It was on a weekend morning some time before 2004 directly across from our table was Scott McNealy with his family.
Flea Street Cafe in Menlo Park Eric Schmitt, Larry Ellison.
Chez Panisse in Berkeley sometime between 2004–2006 Steve Wozniak
Chef Chu in Los Altos many times between 2002–2018 the daughter of the owner use to work for the office I worked out in 2003 she always is so nice to me and my guests whenever I go there. I’ve seen Sergey Brin, Stephen Schott, Sheryl Sandberg, the late Steve Jobs. The walls are covered in memorabilia of past guests such as Presidents, Royalty and Super Famous athletes and Celebrities.
Starbucks in Los Altos over the years saw many that included: Anne Wojcicki.
Bucks in Woodside people have included John Doerr and Tim Draper.
Nut House in Palo Alto: Mark Zuckerberg.
Whole Foods Market, Redwood City, Tom Brady.
Not saying it doesn’t happen, but not once did I witness any of these highly successful people being disturbed by a person they didn’t know even though I and others in the venue recognize who they are. I love Silicon Valley for that. You can go out and not be disturbed.