fathom - 1:09 am on Mar 2, 2013 (gmt 0)
The eye-opener for me is that they still have to manually remove some of this stuff. A grammar check combined with topic detection could certainly flag most of it. Still, it's nice to know human spambusters aren't completely obsolete for the time being.
There are many flaws in math (the algorithm) where you simply cannot perfectly detect spam with a 0% threshold without including a montage of false positives.
Getting rid of spam is a high priority but accidentally getting rid of quality because in emulates your math in some way is a higher priority to avoid.