It is important to repeat "copying is not theft" because it's at the heart of the arguments that e.g. the MPAA make to the public in order to convince them of the evils of copyright infringement ("you wouldn't steal a car," etc). TFA seems to be trying to appeal to the evil of Kraft's deeds by suggesting that something has been stolen from him.

It seems clear to me that nothing of the sort of theft has happened, and at least some people would instead be flattered to have their work reproduced large scale instead of slinging accusations of theft. If it were me, I would use this to promote the value of my own work. Maybe I would try to talk to someone at Kraft before firing the lawyer cannons, perhaps just work out a deal where they give me some sort of recognition. Even recognising the copyright infringement, it seems to be on such small scale (one maze out of hundreds?) that it might be difficult to argue for damages incurred.

This person isn't flattered, but the language of "theft" indicates a graver damage than what actually has happened.

It was T.S. Eliot. and the real quote is "Immature poets imitate; mature poets steal; bad poets deface what they take, and good poets make it into something better, or at least something different."