The consensus among the creators I know seems to be that honest disclosure is best; but anyone who can should put noise, traps, popular public domain materials, or “poison” in each project to reduce the scraping’s efficiency.
May the models train on hundreds of bagel dogs that are given names like Caramel, Camel, and One-Eyed One-Horned Flying Purple Stuffy Eater for serious-sounding games with competing game mechanics.