That is why I list "Amusement Park" locomotives such as Crowns and Cagneys, and homebuilt steam locomotives bigger than 12' 0" in guage in "Surviving World Steam Locomotives"; but I add a note that they are such in the Notes field.
The Cagneys were made back during the glory days of steam, while steam locomotive construction was still going on in Europe when the Crowns were being made. Rather than hauling sugar cane in Indonesia, they hauled happy families around amusement parks.
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I am glad to see that they are getting a little more respect these days; I am afraid steam engines in theme parks won't be around forever either. Enjoy them while you can.