If people really flat out lie, for no benefit to them, they probably have other problems they should take care of. I don't think many people lie about their results.
Then there's people who think they have results when they don't. People saying they have regrowth without before and after pictures is about as credible as spooky ghost stories.
I believe that people think they see results. No reason to ever doubt someone's thought. A thought is always real. But just because they think they see something, it doesn't make it true.
Only way to show results is through before and after pictures!
Oh, but I have seen a few threads where people post before and after pictures, and the only difference in the after picture is longer hair. Funny thing is a lot of people on those threads think it's regrowth too...