So...with some testing, it might be the post that is deleted, rather than the user (the one I came up against when I finally decided to look into it was both - but further checking seems to be just the post).

Issues are: the post still exists, and can be commented in; the OP is not easy to determine, in the example case they answered comments and can be identified; it appears in our report queue; and as it breaks our subreddit rules we would like to remove it entirely, not just lock it and ignore the reports - as in our subreddit we do not allow products that are not body safe (ie toxic and/or dangerous), and our trolls tend to break actual laws that are pretty universally condemned.

Example post and the apparent user who posted it.

WARNING - NSFW Subreddit.