Shreddit

Shreddit is a Python command line program which will take a user's post history on the website Reddit, and will systematically go through the user's history deleting one post/submission at a time until only those whitelisted remain. It allows you to maintain your normal reddit account while having your history scrubbed after a certain amount of time.

When it became known that post edits were not saved but post deletions were saved, code was added to edit your post prior to deletion. In fact you can actually turn off deletion all together and just have lorem ipsum (or a message about Shreddit) but this will increase how long it takes the script to run as it will be going over all of your messages every run.