The ones that always give me a laugh are the ones that advertise weight loss pills, and they show the before a picture of a half naked flabby person, and the after looking like the spent a year with a personal trainer. Like pills alone are really going to give someone a perfect six pack and a tan! If you look at the screen really close it says "results not typical". The other one that gets me are the acne wash ones. Fist of all, many people with mild acne have really good days, and obviously they are going to take the after picture on a good day. Secondly, the before picture is taken with horrible lighting, the person has messy hair, no makeup, and wearing a miserable scowl. The after picture looks like a glamour shot. Perfect ligting, perfect hair, pounds of makeup to hide any kind of blemish, and of course a generous smile.
I think generally anyone with high intelligence and who are good at noticing details can figure that stuff out. Most of my NT family is pretty good at picking apart commercials too.
But yeah, remembering names is the trickiest. It creates false familiarity, which makes people (even smart ones) more comfortable to try the product. I'm sure this has worked on me many times, but I still try to find what works the best and what I like the best. I'm pretty careful that way.