I think you're conflating two different things. The first quote is impolite but affirming, while the second one is polite but extremely negative, maybe even ha

I think you're conflating two different things. The first quote is impolite but affirming, while the second one is polite but extremely negative, maybe even hateful. It's true that a simple keyword filter won't work very well if your goal is to detect the hate rather than the cursing. But there are also mature techniques for doing sentiment analysis. The canonical example is for automated analysis of movie reviews. Those techniques would be much more likely to pick up on the positivity in "bad-ass" and "awesome!" and the negativitiy in "pile of", "isn't worth", "wipe", and "backside". https://en.wikipedia.org/wiki/Sentiment_analysis https://en.wikipedia.org/wiki/Sentiment_analysis