Yes, businesses should be required to display actual food instead of plastic food if the fake food industry is committing a fraud against people in the country and around the globe. I have never heard of the fake food industry before so this is shocking. If the fake food industry took off, changes need to be made.
Fake food has been a mainstay of advertising for over a hundred years. Most people understand that the food is not real, and it allows people to get an idea what the real thing looks like, without having to waste food by leaving it under hot lights or in glass cases to spoil.
Nobody wants to purchase food that was used for display purposes all day or for several days. It also costs money to just maintain the appearance of the food. There is no need to require businesses display actual food instead of fake food. The public should be made aware that the fake food is for appearance only.
Delis display real meat, but this practice should change. Fake food helps businesses convey their product accurately while still preserving the freshness of their "real" food items. This practice is a health and safety issue: the presentation of fake foods prevents real food from going bad and compromising the sanitation of the business.