What is an NFT scammer?

Excuse me, could you please elaborate on what an NFT scammer is? I've heard the term being used quite frequently in the cryptocurrency and digital art world, but I'm still a bit unclear on the specifics. Are they individuals who prey on unsuspecting buyers by selling fake or fraudulent non-fungible tokens? Or is there more to it than that? Could you provide some examples of how they operate and the potential risks they pose to investors and collectors? Thank you for your time.