I found a similar request from 2007:
Lauda should have his ability to delete posts in Self Moderated thread removed.
To revoke forum features for some particular users might not be the right call.
It has been done before:
Enough time has passed; you can edit your posts now. Note however that unlike how it was years ago, edits are now logged and available to admins. Also, since you were previously prevented from deleting replies to selfmod topics, and I see value in continuing to prevent this, I removed selfmod status on all of your past topics (topics 166416, 166498, 180287, 206948, 206949, 248803, 270101).