This is where the creator has a very specific duty of being careful about what features are fed into the learning algorithms - including names, gender and other

This is where the creator has a very specific duty of being careful about what features are fed into the learning algorithms - including names, gender and other protected category info is a huge no-no. The NLP part is complex because language and dialect differences can reveal a lot about the individual and her/his background. If you have to analyze non-standardized inputs, some personalized data is going to leak. The question is how much does it affect the outcome.