I disagree. She did not almost destroy the place, she successfully turned Wikipedia into an intellectual black hole encompassing the entire human history. There are only unprintable words to describe her vileness.
What did she do on Wikipedia?
She "fixed" barelinks and did categorization work. On the former, she wrote a script that utterly buggered up links to the extent they were being cleaned up long after she was banned. On the latter, she was so toxic that she was eventually blocked for her actions on categories.
She was a toxic editor who did virtually no editing of content on the site.