I don't know if others use Twitter the same way that I do, but I tend to like things quite a bit more frequently than I tweet or retweet things. I'd imagine that if you analyzed my last 10 years of Twitter likes, you could learn much more about me than just by looking at my timeline. My likes probably reveal exactly which political, technical, and social arguments I followed, and which sides I took in all of them.
I recently programmed a tool called semiphemeral to automate deleting all of my old tweets (except for ones that I want to keep), and it also goes back and unlikes all of the tweets that I liked more than 60 days ago -- or, so I initially thought. It soon became clear that semiphemeral only actually deleted the most recent 4,000 likes.
In the almost 10 years that I've been using Twitter, I tweeted about 13,700 times, retweeted about 9,000 tweets, and liked (or "favorited", as we called liking back in the day) about 14,000 tweets. I decided to delete most of them using a tool I just finished programming called semiphemeral. Here is why, and how.