The hypocrisy and want to suppress the knowledge of things deemed as being "unsavory" is the forte of those who rely on religion (for one) to blame others this way.
They are usually guilty of larger and worse "sins" (I have experience with how these people think and act with my family and others) and they prefer to use other "sins" as their way to market them as being "perfect".
Blame of others makes them look right for what they do in the dark.
Likely no coincidence that Adam Weishaupt in forming the Illuminati in Bavaria, circa 1776, preferred to call his clan "The Perfectabilists".
You really might not want to deny service this way since you will never know your customer's real intent and can only glean that from some words he makes YOU write on the product.
Seems a trap. And of NO concern to the vendor selling you the cake.
What is inside the cake is what counts. To be corny.
The worst sin seems to be speaking against something that is wrong.