Unfortunately, too many posers don't grow up or out of it.
I'm related to one.
He can clear a room in minutes just by opening his mouth because everyone who knows him, knows him.
He's never been able to maintain employment under someone else, because eventually he just wears out the welcome and he gets run off. So, he works for himself. He has his own business, and he can be extremely successful at times, but he eventually destroys his own credibility and his business fails, then he moves, and starts over in a new town.
My wife calls him "The Mouth". I simply can't stand to have a discussion with him because at some point, he'll begin upping the level of BS to a nauseating rhythm.
Years ago, we worked together, and I had had enough and confronted him on it. All of it. He was backed into a corner, and I forced him to admit that he's full of it. But it changed nothing.
He's about 40-years old now, and probably more fake than ever. It's frustrating seeing a loved one with such a self destructive habit like that. He gives nobody any reason to respect him.
It's just a sad, sad pity because they never realize that everyone is onto them. They continue to believe that they've still got us fooled, or maybe they think it is all real (their lies), or they just blame everyone other than themselves.
I don't know if he really respects himself. From the way he presents himself, he's head-over-heels in love with himself.