The existence of militant Christian Taliban groups is old news. Such a group with the technical savvy to make a website loaded with flash animations and a Google maps mashup showing all the satanic sites in Amarillo (including Buddhist temples and New Age gift shops) is a bit more interesting. A group like that whose leader has a day job as a security guard at Pantex, the place that assembles all of the US's nuclear weapons, is frankly terrifying.
Short of the Army of God snagging a nuke, which I have to admit seems unlikely, the Texas Observer article shows that this group has developed a more mundane tactical innovation -- they regularly publicize the names of people doing things they disapprove of, such as attending swingers events or going to a Unitarian Church, often resulting in actual harm such as job loss. They will surveil ungodly sites and take people's license plates, for example. Given how easy it is to find information about people these days, and to spread it far and wide, I'm guessing we'll see more of these tactics employed in cultural and political conflicts. Perhaps people will think twice before exposing their life on Facebook, unless they plan not to have any enemies.