[Lestat]

An unhealthy INTJ 8 would be too lazy to fuck someone else's life up.

This.
If the thread was INTJ 7w8 lethal combination I might actually agree.
7w8 INTJ would strategically fuck up somebody's life for the sake of the lolz.
/generalisation.

[dfoster]

I knew 8 is the most destructive type but INTJ? that's the worst too? Hey, then I guess it's not our fault then :)

[jbking]

I can't see a Type 5 being that dangerous as they may have wild plans but they would rarely act on them. A type 1 or 3 though I could see being really dangerous, more so than a type 8. An unhealthy type 1 could be rather zealous and with a moral compass a little off compared to the law could be quite the threat I'd imagine. Similarly, the Achiever could work overtime trying to keep up an image that requires some unethical sources of capital if the image capital intensive, but this is just my view.

[lib]

I guess necro-posting is OK when the subject is death.

[sleepykitty]

I don't have any rational basis for it but reading the topic of this thread sent a shiver down my spine.

I'm pretty sure Lex Luthor was an INTJ 8.

[TheWaffle]

*sets fire to thread*

[DJArendee]

An INTJ would get angry or run away if you looked it in the eye and just talked trash quickly and aggressively to the point that it couldn't keep up.

[Niccolo Machiavelli]

I think this whole thing is silly. While a smart person might be able to come up with a way to kill you and get away with it, a dumb irrational person who is quite angry will go into a rage and kill you. What is the end result? In both cases, you're dead.

[cantstopthinking]

Type 8 here... Resisting the urge daily, in a neighbourhood near you. Intrigued by possibilities. But I'm quite healthy though, sometimes just looking for thrills and not getting caught.

Eights have enormous willpower and vitality, and they feel most alive when they are exercising these capacities in the world. They use their abundant energy to effect changes in their environment—to “leave their mark" on it—but also to keep the environment, and especially other people, from hurting them and those they care about. At an early age, Eights understand that this requires strength, will, persistence, and endurance—qualities that they develop in themselves and which they look for in others.

[sherkanner]

Well, anxiety and type 8 doesn't add up to me. Type 8 are like type 9 and 1, prone to anger, which can be extremely destructive.
So a real INTJ E8 can be a lethal combinaison.