I had hundreds more junk comments and trackbacks last night and deleted them all. Tonight I had another 98 new junk trackbacks and 37 junk comments in just 24 hours. So I went on the hunt for something to fix the problem and came across a plugin for MT called CCode and TCode. The code was not so simple to install, but after perservering I've got it working on all blogs. The instructions are well documented and the comments fill in the gaps. My biggest problem was finding a file called mt-site.js on this weblog. It must be automatically generated via the new default templates in 3.2. Because this blog does not use the default templates I had a bit more fiddling to do to get it to work.
This plugin is for blocking feedback[ct(=comment) and tb(=trackback)] spams by adding an additional CCode(hidden ct input field) or adding TCode to original tb ID in tb URL, and then obfuscating that Code for the purpose of not easily guessing it.
MT 3.2's enforced anti-spam system is performed mainly after getting feedbacks. So if many spams are arrived, then it also uses system/MT user resourses when filtering, junking, unpublishing, and deleting spams although it becomes comparatively easy than pre 3.2.
CCode and TCode works in before saving spam feedbacks to MT system. CCode/TCode make it very difficult for spam-bots to guess tb URL and required ct input fields. Target ct/tb URLs to send spams are calcuated from unrevealed entry/trackback data and obfuscated by Javascript.
I had a real problem with escalated bandwidth usage a couple of months ago and these spam comments and trackbacks are probably the reason I was forced to upgrade my website service. So if you think these junk items are just an annoyance, think again. I'm out of pocket because people claiming to boost your sex life or cure all your ailments are intent on getting there advertising in your face. They're making money at the expense of the go-betweens - you and me.

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