Aside from manipulation, I don't think it's an ILI's tendency to like people and throw them away after because they think they liked them then but they realize actually don't. ILIs know exactly who and what they like and don't like. Not knowing what they like seems like ExE problem more than an ILI problem. Probably the similar "evil" thing ILI does is that they close themselves off and get wary of people just because of the tiniest thing you did that set them off - "Yeah bad vibes, I don't like you and you'll never be my friend, go away!" and they would stop talking to you after that even if you try to explain yourself. I'd say if they see you as an "enemy" or someone repulsive you would never be in their circle. (When you get into the inner inner circle though, I get super blind you could kill someone and I will help you hide the body or something. It's super mafia-esque)
Derailing a post was just a joke regarding what rtht did, and tbf it's so easy not to derail a post not because ILIs are narcs but because of the simple fact that they want to stick to the topic/wanted to reply to someone? ??? lol.
I don't know about Ted Bundy but dude, I would assume similar ILIs are as victimy-looking as I do lol. 100% the type to just do her own thing in the corner and hides away from the social scene as much as possible. They're mostly just lost in their own reality thinking about some arcane shit most of the time while doing some basic work laboriously even if they don't like it as much as going full Ni because it would hurt their future prospects if they don't. They wouldn't even pay attention to majority of people around them. I mean just look at famous ILIs lol.
In general Logicals trick you with facts, not emotions. They're so bad at it.