[Eileen]

Yeah, I have very little experience with INFJs gone bad besides myself... but I'll give it a shot.

INFJs gone bad can become very narrow-visioned. This isn't necessarily a bad thing generally and can even be useful in some situations, but it's not really natural to the INFJ, so I think it probably tends to be negative... as in "screw that, I'm looking at this, what you're saying doesn't matter or isn't relevant to what I'm doing." INFJs are not good details people, so being overly focused on one thing can lead to ruin and disaster.

INFJs, in my limited experience, can have awful tempers. I have been explosive in the past. I would definitely throw things and say the most hurtful phrases that came to mind when I was a teenager. I've mellowed out and learned not to let things get me that angry anymore.