it seems to me if any type is scary it is the entp!!
entjs and infjs are both rational, often you can reason with them and understand their goals.
ntps are often impossable to understand, take the joker for instance,
he is nothing to lose. his motivation is only an abstract set of princibles so screwed up sometimes the entp himself cant understand them. and a desparet need to be loved.
if we fear that which is unknown then the entp is a monseter.
they combine the clever manipulation and subuectivity of the infj (Fi) with the dispationat reasoning of the entj (nt).
I know one entp for instance who is an honest to god white supreamest!
here are some villins for comparison
entp: joker, (also an exelent example of a deranged entp is in the novle "in the lake of the woods" by tim o'brian)
not saying entps are bad just that they have a higher capasity for evil than us entjs and infjs
(ps. i often find intps can be even scarier)