We currently experimenting with sentiment analysis on user profiles (only staff can see it). I think at some point we might open this up for all users to be able to view it.
I think depending on the models, this type of analysis could be possible in the future by looking at the entire topic/post history for a user. Though this might be limited to a certain extent
I do think this might give off false positives though as how do you truly know if someone means well unless you know them intimately in-person?