Alright, so far the DNS change has not broken anything. I'll be able to get some statistics of how it has performed tomorrow. If it performs up to expectations, it should have been able to filter out most of spambots and other **** before they even reach the server. This is not in place for game-warden.com domain however, only hard-light.net.
Coincidentally SMF 2.0 RC5 was also released today which I've already upgraded the forums to. Full changelog included following two entries:
! Users were logged out when other failed attempts to login were made (Load.php)
! Unoptimized query for topic participation query in unread topics. (Recent.php) [Bug 4457]
Which are two bugs I believe we have met.
Should stop the immediate grief we've had.