It’s hard to tell exactly when AI slop stopped being just a punchline involving Will Smith eating spaghetti and started feeling dangerous. That’s actually part of the problem. This year, many of the popular AI tools that used to struggle with the number of fingers on a human hand gained the ability to generate photorealistic video — with audio — that costs users virtually nothing to create. Even trained scientists can’t always tell the difference between what’s real and what’s machine-made in digital form. But the most insidious applications of this remarkable technology are playing...