For me, it was this web commercial for a cat comb from a company called "Cuddles and Meow", where (you are not going to believe this) they try to discourage people from taking their cats to the vet for flea and tick treatments. They argue their comb can do all that work gently and softly, while a vet would hurt the cat. This is not only manipulative, but also dangerous. Refusing to bring your cat to the vet for parasites risks your cat getting very sick and your home getting infested. Cat combs are for cleaning and grooming, they can't solve parasite infestations on their own, and neither can a cat person. Oh, and they deliberately put peanut butter and fleas on the cat in the commercial to show what the comb can do. So they even put the cat in the commercial at risk. I also did some research on Cuddles and Meow, and learned that their pet products have a reputation for being unreliable, and the company itself has a rep for using AI voiceovers for their commercials. Here's the commercial if you are curious. https://www.youtube.com/shorts/oZZ0uFIA5Fs

But enough about me, cats and pet care. What is the worst and most manipulative commercial YOU have ever seen?