The location "Hayter's Folly" in the Oasis area could be a reference to two different sources. It could be an intentional misspelling of "Hater" as in the phrase "Haters gonna hate". It's been a rather popular word online, particularly in relation to online gaming and forums related to that. Intentional misspelling has been a common theme in some of the jokes and references in the game.
It may also be a reference to David Hayter who is a famous video game voice actor well known for being the gruff voices of both Solid Snake and Revolver Ocelot in the Metal Gear Solid series.
