Besides the obvious question “What could POSSIBLY go wrong”, you really went over there to train the sentiment analysis software? Oh, my. Why?
Ladies, Gents, as someone who has some background in statistics (but none in ‘digital humanities’, admittedly), I strongly recommend to worry about people who tell you that any form of tech, especially based on statistics, is going to solve the problem of humans acting un-ethical or immoral.
While I’m at it, I would recommend to worry about anybody who prefers technical solutions above societal solutions for anything.