In answer to your question Mr. MeSelf.

PG - some material may not be suitable for children.
(a "damn" word, or a "hell")

Some critics believe that independent films are held to a much higher standard than major studios' releases.

I am sure the following lyrics earned it the rating.

Some Humans Ain't Human
John Prine words and music
Album Fair and Square
released by Oh Boy Records, 2005

Mm
Some humans ain't human
Some people ain't kind
You open up their hearts
And here's what you'll find
A few frozen pizzas
Some ice cubes with hair
A broken Popsicle
You don't want to go there
Some humans ain't human
Though they walk like we do
They live and they breathe
Just to turn the old screw
They screw you when you're sleeping
They try to screw you blind
Some humans ain't human
Some people ain't kind
You might go to church
And sit down in a pew
Those humans who ain't human
Could be sittin' right next to you
They talk about your family
They talk about your clothes
When they don't know their own ass
From their own elbows
Jealousy and stupidity
Don't equal harmony
Jealousy and stupidity
Don't equal harmony
Mm Mm
Have you ever noticed
When you're feeling really good
There's always a pigeon
That'll come shit on your hood
Or you're feeling your freedom
And the world's off your back
Some cowboy from Texas
Starts his own war in Iraq
Some humans ain't human
Some people ain't kind
They lie through their teeth
With their head up their behind
You open up their hearts
And here's what you'll find
Some humans ain't human
Some people ain't kind
Mm Mm


Sincerely,
Gargoyle

It is a film I will certainly see.