A straw man? Hardly. The "straw men" mentioned in the article are icons in the field of dispensational premillennialism. They are examples of what happens when people get caught up in End Times hysteria.
To address your claim that their eschatology cannot be refuted, the scripture references from Romans, Galatians and Hebrews are stumbling blocks for premillennialism. The dispensationalist cannot help but twist the interpretation of those passages in order make them fit into their paradigm.