Why do people pretend to be crazy?

I think people pretend or even aspire to be “crazy” because they think it’s cool like the Joker from Batman. I purport it’s a fantasy of people striving to be different who in reality aren’t that different.
The reality of “crazy” is a much less romantic notion than teenagers make it out to be.

I knew a whole bunch of people in high school who got together and pretended this. Really, they just sought attention.