I just found the perfect formula for creating a believable, young INTJ type I could post shit with, and perhaps reach 7000 posts before being exposed!
1) Choose an avatar a sad, sad boy would choose. Perhaps a serious anime figure.
2) Imagine a personality for yourself where you are respectable, steady and knowledgeable. Nothing of that will ever have to be substantiated. Just look at the avatar chosen in #1 for this and you'll get in the mood.
3) At random, post statements pertaining to your image. Anything where you look down upon other people is good. You don't have to listen to anyone for this.
4) At random, quote parts of people's texts and insert "No", or if you're up for an extra challenge, copy some fine negative statements someone cool once said, and act if they pertained to the situation. This is almost like listening but you still don't have to listen. Isn't that cool!
I'll do this a few times and I'll be on my way to e-fame. That is, with that INTJ. Here I come, INTJ's, I'll be joining you in fame!