Hopefully the author had a bright intern on staff who was able to crunch the initial draft through this old, old technology, then recommend revisions so as to point it away from his or her real identity.

So he suspects somebody because of these 2 words: malign behavior ?

At the end of the article he says that he's satisfied with "tidytext methods", when it should have ended with: this sort of analysis is stupid and tidytext shouldn't be used in this context (less data than a highschool newspaper).

Imagine if by chance a poor guy in the White house gets fired because he tweeted more times about Russia than Trump.