Due to 'comment spam', I've changed to Blogger comments. While I do prefer Haloscan, it doesn't provide a way for bloggers to protect themselves from things like the above-mentioned spam. However, Blogger comments (when on the 'Only Registered Users' setting) make people be a bit more responsible for their their posts and save me the time of having to clean up the Haloscan comments.
I apologise in advance for any inconvenence that might be caused by the change.
**** Update: 21 June 16:19 ****
Apparently, Blogger comments doesn't like me. When clicked on, it didn't provide a comments field, so I'm back to Haloscan now.