heisje - 1:48 pm on Mar 28, 2013 (gmt 0)
in the dirtiest part of the Net
and at this time by far the largest part of the Net, care of Google policies.
Like with state taxation, when over-taxing state ends up with *fewer* taxes collected, due to the contraction of the economy resulting from over-taxation, likewise with over-fighting spam you end up with more spam in return, because non-spam sites are burnt along with real-spam sites, rendering the risk of creating an expensive non-spam site unacceptable, therefore reverting to techniques of all sorts to remain viable.
Simple "Economics 101".