It's not. I've made a lot of incorrect suggestions regarding possibilities for people's types, but that's all they are... suggestions of possibilities for consideration.
I see patterns and breaks in patterns more than anything (things that fit or don't fit into different temperaments, dichotomies, quadra values, etc.), and my "
typings" are more often than not things like "sensory and logical, possibly rational" and "Fe/Ti, introverted, probably LSI" than actual specific types (even if I do mention a possible type).
Usually when I'm pointing out a break in a pattern (something that could point away from a temperament, dichotomy, quadra value, etc.) I specifically mention that it's possible that there's another explanation for what I'm seeing.
FDG's just pissed because when I did this with his former "general concensus" (and self) typing of LIE, it cause people (himself included) to question that typing. At this point most people see (independent of my input) that LIE just doesn't make sense for him. It appears that he blames me for this. (I'm guessing he's going to say something along the lines of "no, it's got nothing to do with that, you just suck".

)
Anyways, my tendency to question people's types does nothing more than point out possibilities. It's up to individuals to consider or not consider such possibilities and come to their own conclusions.