Good call, when you press "generate your own" it tries to detect these and displays a little warning but my blacklist is not complete. My model is bolted on top of GPT-2 which used the web as a training set which is probably why some of these are popping up.
https://www.thisworddoesnotexist.com/w/metamucil/eyJ3IjogIm1...
edit: also got "redbull" https://www.thisworddoesnotexist.com/w/redbull/eyJ3IjogInJlZ...