Yes, and all too fucking often as a cashier.
Typically on geriatric Boomers shits who think they can get their way by intimidating everyone, and WASPs with severe attitude issues who seem to be perpetually on the edge of a Neurotic Crisis if the slightest fucking star goes out of alignment. I remember one who was streaming a Mitch McConnell speech on their phone speakers at full volume and kept ignoring me when I tried to ask her basic shit like "Do you want any Stamps/Garbage stickers?" and "Do you have a Rewards Account with us?"
And on one of my coworkers who has over the years I've been there been very clearly not right in the head - And he was wearing it WHILE ON THE CLOCK, SERVING CUSTOMERS, AT MY REGISTER - I told him to put that shit away as long as he's bagging at my register, and he threw a fit. And in the weeks since I've been getting treated like a pariah by several of my coworkers, down to what sounded like a threat to me whispered into my ear just today. Skipping that joint ASAP, surrounded by too many pieces of shit at this workplace, both in customers and coworkers.
Everyone who wears a MAGA hat unironically belongs in a fucking psych ward. I've had enough of dealing with them in-person.