No, it isn't foreign. I remember going to the local jail for a field trip one time, and having convicted criminals tell me not to do what they did. I just don't see how anything applies to other people outside of one's own mind- if we are talking about someone throwing up their hands, saying "Oh, I have lost all my faith in humanity!" (which is usually over some trivial thing, as I have witnessed on this forum), that person certainly has the option of not being part of such a terrible experience that they make it out to be.
It isn't that someone out there might not get some sort of good out of being told something by someone doing the exact thing they are talking about, but in most cases it seems very futile for those that are so disenfranchised with society to go around lamenting it's death, when they could be contributing something positive instead of more negativity.
In certain cases, like the Holocaust for example, I could see how the brutality and terrible acts commited could make someone lose faith in their fellow man. Someone kicking a puppy, for example, is not worthy of the same lament. I guess I should have said that from the beginning.