I don't have examples, but it seems to me you really hear a lot of teens pulling off successful social engineering attacks, even back to the days of phone-hacking. I guess that is evidence that some teens develop a fairly comprehensive understanding of social interaction.
Or, maybe Twitter just had some obvious loopholes that even a not super social-aware hacker could find and use?
I think it is better to assume that in these situations it is more incompetence from the platform than "super-genius" from the hacker that allows for things like this to happen (regardless of what Twitter needs to say for PR or the media needs to imply for clicks).