It's important the degree and conditions. With what was done against being polite - the _possibility_ to have Fi type is low.
Should be taken cases when I typed with assurance to Fi. Then. I may type people which have partly uncommon for a type behavior to that type if VI pointed to that type strong enough to overweight the existence of uncommon behavior. when _other_ factors besides Jung types may predispose to that behavior. as types related nonverbal is _harder_ to be changed by other factors in a way to give _assured_ impression of other type
Also Fe valued types may perceive Fi types worse, - their behavior as lesser morally appropriate. I evaluate by my taste, which may perceive Fi types easier, taking concrete cases and with overal more positive impression.
> and some who are polite Fe egos
It's not so hard to follow nonvalued norms of strong functions, especially in forum texts. To fit better norms of any regions is a normal intention. It's more important what norms people break as that points on good chance those are weak or nonvalued regions.
If a human has F type and breaks much Fi norms - those are doubtful to be valued. With matching results of VI there is more basis to point on this, as this trait has more chance to be correct.
I remember a single case when a girl I typed to ESI with assurance. While the behavior was stably, rather and senseleslly rude on a forum.
Here is Number 9 which behaves strangely for Fi. I suppose SEE for him as most possible, though not sure still. I suspect lesser standard mind or he gets something what rises hooliganism. If VI would pointed to Fe, than I'd gladly thought him so.
Do not remember others. They could fit to be generally polite in my perception.
> Stick to idealizing/idolizing your duals
there are borders which fit to norms. when the borders are stably strongly broken = good factor to suppose another type
previosly was base Fe in the profile. and mb several T types. seems Fi in the first time. with such progress there may appear EII
what would be abolute blasphemy