Here[0] are the supposed pics of the admin panel the hackers accessed. Assuming their legit, it seems like Twitter has some blacklist features. Can't find any info detailing how they exactly work, but it seems an admin can blacklist a user from the trending page or from search results. Pretty interesting.

Oddly enough, posting the screenshots resulted in some users getting their account suspended or Twitter pulling the picture down.

[0]: https://video-images.vice.com/test-uploads/_uncategorized/15...