After receiving the inserts R is likely to be more:

Choices:
A. trusting
B. not enough information
C. deceitful
D. cautious.
cautious.
What are the worst examples of false advertising you've seen? Did you fall prey to their claims?
Rather that vouch for myself - my story is trite, and not particularly interesting - I'll relay the tale one of my nurses shared with me when I was laid up in the hospital for a few weeks. Call her R.
R was from an Eastern European country. We chit-chatted a lot, while she was taking my blood pressure readings and stuff. Lots of fun stories! But she relayed to me one of her first U.S. memories:
She wanted to lose weight. She was impressed by some things the U.S. had to offer - "you have actual nutritional information on everything!" - and thus figured everything she encountered was on the level. And she found a "miracle cure" company who was along those lines! "These are AWESOME miracle shoe inserts! Wear them, and the pounds will melt away!" She saved her pennies and dimes; she sprung for the inserts.
She received them... and they were shoe inserts; that much was true. But then there was their documentation: "using these insoles, combined with a 1200 calorie-per-day diet...." Like a 1200-calorie diet won't likely involve weight-loss, no matter what else you did, shoe inserts aside. The inserts did nothing, obviously. It was a sham.
At which point she knew she was snookered, but really had no recourse. She wasn't explicit about it, but I got the feeling that it was a leading factor towards her chosen profession. "I might not have been the most sage medical person ever, but I'm gonna rectify that, and if ever I hear someone falling for that sort of gambit again, I'll be there to nip those sentiments in the bud with my own anecdotes." Which is awesome.
I still feel for her. I wish I had contact information, so I could touch base, and express those thoughts personally. But that's the most personally resonant version of false advertising affecting someone that I've seen.