Maybe I'm weird. . . . Ok scratch that, my own signature reveals that I know I am weird, but I try to present myself as the same person I am in real life, except that on the Internet I am more reserved and cautious. I am more careful in what I say, and I try not to speak unless I can improve upon my own silence. But many people seem to be the opposite way.
As far as someone being a farce, I think ultravox got it right: who really loses in that situation? If I am so concerned with being fooled that I cannot treat everyone I "meet" with an initial and appropriate level of transparency and trust, then I am the big loser in the end. If they abuse that trust because of some latent, narcissistic issues of their own, then I consider the trust I gave them a small price to pay to prop up that one's own shatterred self-concept and maintain my own freedom and ability to trust and be real. For example, I was saddened by dennilfloss' duplicity, but I know that he was, and is, hurt far more by his own deception than I was.
BTW, I believe in Wombat Woman.