Dr. Walt Brown's Hydroplate is just another variant. He hand-waves away the apparent faunal succession from prokaryotes to eukaryotes to trilobites to dinosaurs to mammals to man as an artifact of "hydraulic sorting." (So why aren't the trilobites up with the pill bugs?) He has the continents racing about after the flood, whacking into each other like carnival bumper cars at energies that would have melted everything in sight.
He's not so much a charlatan as a buffoon.
Sadly, there seems to be an epidemic of voluntary buffoonery these days. I have no problem helping students who simply weren't exposed to the facts in remedial grades, but this willful denial of decades of patient and painstaking research by scientists committed to unraveling the mysteries of our existance is frightening.