I don't pay attention to what my neighbors do. I live in a damn nice house in a very HCOLA. My husband would be looked down upon by some, because he is a tradesman. They might also be shocked at our NW, but then I don't compare that either. Hmmm, there's a thread on that somewhere... Learning how to get the most bang for your buck is a mustachian trait, as is not worrying about keeping up with anybody, whatever their name is.
Today, I was working on some estate stuff at my parent's bank. I had an hour or so to kill while the bank tried to figure something out. I walked around Downtown and into some stores, particularly World Market. Shit, I can't believe how expensive everything is! Their 12 oz. bottle of Cholula Hot Sauce is $6.99. Yeah, I get two of those at Costco for that price, plus a rebate. (Minus a rebate?) I walked into ZGallerie and damn near died. Who needs all that crap? Who is everyone trying so hard to impress? They must be selling something, and lots of it, because their rents are astronomical.
Collectively, ignoring what my neighbors do, not shopping in regular retail stores and only buying groceries at the places with the best prices helps me continue to live a mighty satisfied, and grateful, mustachian life.