I do. All the reddit threads that I look at are from online searches regarding some sort of question that I have. Most of them tend to be months old, some even years. You just make the experience of people like me significantly worse. I wish that services like ceddit stored the content of user-deleted posts.
Deleted comments are also easy to ignore. Deleting your comments regularly might be construed as a dick move by some people, but as you say, dicks are easy to ignore.
Dumb analogies are dumb. Carefully curating one's online content is in no way similar to "dropping the paper thrash on the street".
HN has similar problems because you can edit your post after people have replied to it. This means you can retroactively change history and how prior arguments were framed, which can make other people look like idiots or completely destroy a comment chain.
If you're really concerned about anonymity or your history being used against you, then create throwaways. Otherwise you're not stopping corporations from keeping tabs on you, the moment you hit post that data's already been scraped and stored somewhere.
If you really want to be safe, you probably need to utilize multiple online identities. Give the squeaky clean one to your employer if they ask.
https://www.reddit.com/r/learnpython/comments/aoq9yj/reddit_...