Sites like Moteefe allow users to sell shirts with custom designs, but they don't often check for the original source.

Twitter user @Hannahdouken got a bright idea for a little prank. It's a common practice for t-shirt sites to use art from bots that crawl through twitter. The bot-makers find artwork people want on shirts– and then make the art into a shirt, and pocket all of the profits.

Hannah's idea was to call these companies out through their own process–

and by golly, it worked. It actually worked.

Other users have been sending through even more dastardly designs, and those worked too.