I'd say your Fe manifests through your grandiose, intentionally provocative forum persona, as well as the frequently emotionally-charged content of your posts (regardless of whether or not you're aware that they come off that way). Your persona feels more like overcompensation for the sake of a Fe-reaction as opposed to the passive indifference that typically characterizes an ITP's relationship with Fe - you argue through insults, value judgments (such-and-such is 'beneath' me, so his opinion isn't relevant, he gives me serial killer vibes) and infantile rants as opposed to, you know, reason.
Fe doesn't work like that. Fe makes you care about humans more. I always have logical reason behind everything I say I just choose not to go that way because it's not as fun or it's just a waste of time. If you are wondering about my grandiosity just take a look at my tritype.
7w8 <- every 7w8 is a certified narcissist
8w7 <- the emperor god destroyer of planets type
4w3 <- the diva type with a penchant for grandiosity
Basically I have an extroverted enneagram but an introverted MBTI so there isn't really a problem with expressing my Fe (negatively). Plus I'm sx first so that adds to the intensity.
Let me know if you have any further concerns as I will answer them without insulting you for a limited time.