This is a joke, right? I mean, she can't be serious about this.
For you non New Yorkers out there - this is so self parodying that it would qualify as a troll if the author wasn't serious. She's basically saying that she can't bear the thought of living in a neighborhood where the only thing wrong with it is that uncool people like cops, teachers and firefighters live there.
And heaven forbid she shop at, gasp, COSTCO. I mean, only uncool people with big families like southwest asian immigrants and Upper East Side WASPs shop there...
Yep...it reads like a parody only it's true. What was it Mark Twain said once, something like, "Truth is stranger than fiction because fiction has to make sense."
What a twisted evil world we live in.