Over the course of days/week(s), you should slowly edit all of your old comments and posts into gibberish, and mark your posts as NSFW. Later, slowly start deleting posts/comments so that you won't be a target of their rollbacks.

I read somewhere that instead of deleting your account, it's better to ghost it or scrub your posts from the site. I'm a 12 yr acct so I want to make the best choice.

probably a cookie thing