I mean, it exists on social media (so there’s that). There was a case where an American woman screamed at a French baker for refusing a crisp $20 bill as payment despite the fact she’s literally in France (where Euros are used as the main currency).
The stupidest one was from where an American guy was arrested in the UK for having open carry (firearms) where gun laws are strict, him using the excuse of “I don’t know the laws around here” didn’t work since he should’ve researched that beforehand.
On the use of dollars internationally in tourist contexts, I once spent a few fairly unpleasant days in Cancún (the rest of the Yucatán peninsula and CDMX were great, though!), I noticed that a lot of shops and services would accept dollars, which Americans more than happily made use of.
The crux of it was that anything paid in dollars had its price, when compared to pesos, inflated to about double.
It was essentially a form of idiot tax.