Just curious, exactly how close did you get to the t-shirt wearer? Did they mind? Did they stop for you? Usually an "official Disney product" would be designated on a tag inside the shirt... just trying to picture this interaction
They've got an "official" Disney logo adjacent to the words. We were in the next table at the cafeteria (remember when that wasn't a scary concept?), big guy, big shirt, big letters. Nothing creepy!
It’s been a minute since I’ve been to the parks because of Covid, but I am almost positive you can buy those shirts in the park gift shops. So the person you’re replying to may have just seen them for purchase.