Our community has been running on Discourse for one year and is more popular than ever. At this point it is also more common than ever that a user whats do suspend/delete/shutdown their account, ie. does not want to have anything to do with the community anymore.
This should be possible, but it is not. Users usually have solid reasons for leaving the community, and they should be allowed to do so. Content they have produced obviously remains. Suggesting that they “just stop using the site” is not a viable answer - orphaned user accounts are a security risk, if nothing else.
I would like to propose this feature for future Discourse releases. I consider it to be a hygiene feature.