Carded for buying paint brushes

Danielle and I were shopping at Garden Ridge this weekend. During the checkout the computer prompted the cashier to check and enter date of birth of the customer since paint brushes were being bought.

I just can't understand. Teenagers can no longer buy spay paint since they could sniff it or create graffiti with it. But paint brushes?? What are they going to do? eat it? Perhaps I'm missing something, but I don't understand why we need to get carded for buying products that have a legal, creative purpose, non destructive ?

Let's hope this was a data entry error in the store's database and not a new law.