There's no way I'm an ISTP. My Se is my worst function and I've scored 100% on N every test I've taken. I don't identify with the description at all. I hate physical activity; I much prefer to read or sit by the computer.
I don't know how Fe can be reflected in posting. Internet message boards aren't a place that facilitates any kind of emotional bonding, I don't think.
What you see from me occasionally is Fi, either in shadow INTP form or teritary INTJ form. I'm not a hateful person, but a few groups of people, namely people who find memes funny, american conservatives, otakus, kids from the age of 9-12, racists, furries, and others I really hate really really strongly for no rational reason. Not because of what they do, I don't give a shit about that, but the way they act and the way that they conduct themselves, it makes me really mad. Those people have never grown up; they've never experienced anything that made them gain self-awareness. Self-awareness, I think, is a trait more important than intelligence. The reason you think I have a poor Fe is that I probably saw a kawaii smile or something nauesating of a similar vein in the anime thread which led me to post those comments. In the Tupac Serbia thread, I was getting mad at people whose sense of humor consisted of lolcats and image macros calling that genius video stupid so I started calling them unintelligent to get them mad. I don't think this necessarily means I'm an ISTP.