Just curious, why did you decide to use a supervised learning approach for this? You're hard-coding the categories in this manner. You could try using clusteri

Just curious, why did you decide to use a supervised learning approach for this? You're hard-coding the categories in this manner. You could try using clustering instead (K-means) to group the posts together into their own categories. This is similar to a "trending topics" approach, where the categories could change each day.