Over at Making Light, a post about a victim of the Virginia Tech shootings got hit by autoposts linking to a white supremacist discussion of the event. One of the reasons the spam filter is turned so high on this blog, and moderation is sometimes so slow (sorry!) is the blight of astroturf like this from pornographers, MRAs and others. The Duke rape allegations spawned at least three rounds of heavy astroturfing as well. Like fast-growing plastic kudzu, this stuff is slowly choking the Internets.