realtalk....I'm sorry to say this, but your comment about relishing the look on someone's face when you call them out on a lie, is telling. However it tells me more about you than it does any liar.
I need to ask you how careful you are to be certain that some person, any person is not telling the truth, or the whole truth and nothing but the truth?
A person may be repeating something he/she believes to be true although the majority of others knows it is not. This would make this person you feel is a liar, in fact mistaken, misinformed or misguided...who knows for sure?
It is an undeniable fact of life....a reality of human nature: People lie. Huge lies, little lies, lies to save face, lies to save feelings and/or pain....but at some point, in some way or another, ALL humans lie.
Do you write letters to all Sci-Fi fiction writers to call them out on a book full of lies? Or does it please you to see someone physically abused because he/she said something untrue to protect a friend from danger?
One of the biggest lies in life is "self-righteousness." Do some research, I think you may find some interesting information.
Do I condone lying? Absolutely not. No more or less than I could condone stealing, cheating or bullying. Living in society, we know these faults and much more exist...everywhere. Tolerance, compassion and forgiveness enter in for any sense of peace & happiness.
I WILL of course, confront a liar if there is imminent danger, or they are gambling with someone's very life. Other than that, it is enough to know that I am aware. The liar must work on this issue within himself. Having said all of this, please know I speak of our personal lives.
When we are speaking of public figures, Politicians whose words effect millions, lies are deplorable and yes, should (and usually are) exposed.
How some random person "presents him/herself" is of no concern to me. For me to be the authenticity police is at best disingenuous and at worst a waste of my valuable time.