It seems the spammers want a full war. So for the duration, I'm enabling work check and disabling commenting for older posts. This hopefully won't last long. And we apologize for the inconvenience.
At this point they are starting to make it worth while to employ other tools. As has been said, I blog for the love of it. I don't monetize this (and hope to never have to). At some point I'd like to do it through my own domain as all the big kids do. So at this point there's no money in this.
The spammers have taken advantage of complacency to try and garner linkshare to their clients (or their own sites). What they don't realize is my temper. I'm pretty good up to a point. I'll give warnings. Once they cross that point I'm willing to nuke them (there is no middle ground for me, once I'm pissed, scorched earth is my tactic). The threshold they need to cross at this point is to make it worth my time and money to flush out the router maps to their machines, and to reinvestigate a few zombie nets.