'Flat-earth', er... 'Young-earth' Creationists are (in my opinion) fools who are either too daft to understand the principle of evidence gathering and logical analysis, or who have willfully chosen to ignore scientific evidence owing usually to acceptance at an early age of a clearly erroneous, rote religious dogma.
The "young earth" crowd only give the Earth 5,100 years based on their error filled analysis of Bible stories.
They don't count, and their use as a "straw man" is ridiculous.