I think Fe could commit a crime or do something really crazy too. Like I think both could join cults. Fi because it's checked with it's value system and the beliefs of the cult are the same as Fi. Where it's the other way around for Fe...it's like the beliefs of Fe are right (to the Fe) because "everyone else is doing it" (everyone else meaning: usually highly respected and loved people that have already been predetermined by the Fe). So they both have thier advantages and disadvantages.