I don't know what type the people I picked on were. Probably introverts. I never messed with kids with differences or eccentricities or anything like that. I was probably a little different myself. I REALLY doubt I ever picked on an INFP or ISFP either. I picked on the more defiant passive aggressive type of introverts (or what I saw as defiance..). I was horrible when certain people basically didn't kiss my ass.
I fought with extroverts who challenged me too, but that's beside the point.