This may not be PC but it is folk ...

If you're going to San Francisco
Be sure to wear
Rubber boots everywhere
If you're going to San Francisco
You’ll see on the street
filthy people who don’t care
About where they squat and go
Summertime
Will have a stench of faeces in the air
In the streets of San Francisco
Dirty people
With insects their hair
All across the nation
Such a such a filthy inclination
xxxxx in motion
There's a whole generation
With welfare expectation
xxxxx are beggars
xxxxx are thieves.

Mahou Shoujo

The NBC Bay Area Investigative Unit surveyed 153 blocks of downtown San Francisco in search of trash, needles, and faeces. The investigation revealed trash littered across every block. The survey also found 41 blocks dotted with needles and 96 blocks sullied with piles of faeces.

How dirty is San Francisco? An NBC Bay Area Investigation reveals a dangerous mix of drug needles, garbage, and faeces throughout downtown San Francisco. The Investigative Unit surveyed 153 blocks of the city – the more than 20-mile stretch includes popular tourist spots like Union Square and major hotel chains. The area – bordered by Van Ness Avenue, Market Street, Post Street and Grant Avenue – is also home to City Hall, schools, playgrounds, and a police station.

As the Investigative Unit photographed nearly a dozen hypodermic needles scattered across one block, a group of preschool students happened to walk by on their way to an afternoon field trip to citiy hall.

“We see poop, we see pee, we see needles, and we see trash,” said teacher Adelita Orellana. “Sometimes they ask what is it, and that’s a conversation that’s a little difficult to have with a 2-year old, but we just let them know that those things are full of germs, that they are dangerous, and they should never be touched.”