These are actual signs, as posted by the city of Seattle.

I guess 'No Dumping' wasn't clear enough.

The more grammatical sense this makes, the less directional sense.

They really don't want you here.

What? The disabled have to be reminded that help isn't gender-specific?

I'm not sure what this sign is supposed to mean, I came across it in Myrtle Edwards Park...

...but it can take on any number of meanings, depending on your context.