I think one of the main reasons the redneck accent is so used especially here in the south is there is already the fear and sterotype so we just play it up. and in some haunts that accent is not fake. Personally I have always been fond of the Russian or eatern europe accent. But an accent should fit the character if it does not then do not use it. I mean how wierd would it be for a guy dressed up as a redneck hillbilly to open up his mouth and sound like one of the cast members from Jeresy shore.