Can Some Of Them Even Count To Fifty?

I’m a visitor on Big Island in Hawaii. I swing by a convenience store and find myself giggling at a sign on prominent display at the checkout, containing some bullet points:

Sign:

• Hawaii is a state in the United States, so you’re still in America.
• Yes, we accept US Dollars, because this is still America.
• Thank you for saying our English is good, because… still America.
• If you’re not from the USA, this sign does not apply to you.

Me: “Funny sign.”

Cashier: “It’s not meant to be funny. It’s a vital PSA.”

Me: “I’m so sorry to hear that.”

Cashier: “Jokes on me, I guess. Half of ’em can’t even read anyway…”