Had emailed ElGato (the other admin and my friend) a week back regarding this spammer problem, when I got no reply from horror to my continuous emails.
He has been online tonight, and in constant touch with me through PMs since then. Now, the Re-Captcha Anti Spamming Verification Kit has been added to the New User Registration process:
The No-Spam Verification question also stays.
Thanks a lot, ElGato!
Fellow HDCers, breathe a sigh of relief. :)