I wonder if other INFPs or Type 4s do this?
Both online and in real life, I tend to consciously alter my perspective and response toward others depending on the environment. I think it stems from constantly being told by society that my personality is flawed. It's not as acceptable for a man, particularly a heterosexual, to be introspective, self-aware, emotionally in-tune with himself and others, affectionate, considerate of other people to the point of being reserved, imaginative, wary of making rash decisions, etc... These gender-biased attitudes are reinforced by the mainstream of men and women both. Adaptation is a necessity to the point of neglecting your own personality, and then you are chastised for being "fake" and insincere. Fuck the hypocrisy! People are eager to cast stones at those they don't understand. God forbid that someone should deviate from the cookie-cutter template of conformity. Nonetheless, assimilation is mandatory to a certain extent.
I don't wear a facade for the sole purpose of deception. Ultimately, it is a defense mechanism. Sometimes, I will behave a certain way just to elicit a particular response from people; testing the waters to see how deep they are. The drawback is that it hinders a true emotional-connection. In my experience, emotions/feelings frighten people, so why expose them if you don't have to?