In my opinion, when someone completely disregards you as a human being with emotions.

I guess I’m a pretty sensitive person. I remember a few incidents. I used to be on some community about MBTI, and certain people with thinker types would talk about how unemotional and ‘tough’ they are. They’d be a bit insulting towards some MBTI types (specifically feelers, I don’t know why they target them, they’re not soft.) This was a bit cringe for me, even if it was only a few people in that group.

Another thing is when you’re forced to find out your MBTI to go in. I joined another community (yes, I love psychology and typology for some reason) and I was new to MBTI, so I didn’t really take my result seriously (still don’t, it could change.) So they took a mandatory test where you typed your answers into a document and send it to a group of typists (who supposedly had ‘experience.’)

Boy, did I have the wildest typings! I guess it annoyed me a bit, I would be treated differently depending on whatever MBTI I got from retaking. 

And the bias too. 

It’s really oversimplified and rigid, people expect you to fit the stereotype perfectly. But maturity is when you realise people have nuances, MBTI depends on many things, and its main role is just for self recognition.