I like it. But you'll have to do this manually for every post right?
I read someone saying that they tried to use automated tools to delete their posts (Shreddit I think) but Reddit was undoing the deletions, or something. So that's annoying if you have to change/delete every post manually.
I think another issue is the timing of when you do your edits/deletes and when a sub privates/unprivates. I noticed yesterday when a couple subs unprivated, my edited/deleted comments and posts came back.
Most of the scripts also edit the posts first because while Reddit can undelete stuff (for now - GDPR might have something to say about that eventually :) ), they don't keep edit history.
The other catch is the 1000 indexing limit. If you kept a record of every post and comment you ever made outside of reddit then you're fine. But if you have enough comments/posts, then you can't trust your reddit profile to know that everything has been edited/deleted.