I had a task assigned to my testing account (dalai_testing - the one I'm using for this post, while @Dalai Felinto (dfelinto) is the one I'll be using). I can't find a way to delete the account though, to avoid the same problem in the future.
If there will be no UI option to remove users can we at least get rid of the logins created during the testing phase?
Also, @Campbell Barton (campbellbarton) may want to remove his old @ideasman42 and @ideas_man logins. It's confusing to see duplicated when assigning reports/reviewers.