I receive an email every time somebody registers on this site. Most of the registrations I see are nonsense. So today I’ve tightened up the registration options, changed the math question to a CAPTCHA and required users to activate their accounts by clicking a link sent to them by email. Hopefully that will reduce the rogue registrations somewhat.
Interestingly, I haven’t see any spam from the nonsense accounts. They might be used in case a privilege escalation security issue is found in WordPress, so best to remove / block them I think. If anyone has any trouble registering, please post a comment here (you can do that without registering) and myself or another admin will create an account for you.
If you want to revert the changes I have made or have any other feedback, please let me know.