User blog comment:D.Dragon123/Darkness vs Light???/@comment-2229670-20110902153817/@comment-3242083-20110902161555

Yeah, Devil fruits are clearly not powerful against individuals.

http://images2.wikia.nocookie.net/__cb20110603022047/onepiece/images/thumb/e/ee/Whitebeard_Breaks_Akainu%27s_Ribs.PNG/250px-Whitebeard_Breaks_Akainu%27s_Ribs.PNG

And no, Haki will never be used to make powerful Devil Fruit abilities even more terrifying. http://images4.wikia.nocookie.net/__cb20110507090916/onepiece/images/thumb/a/a0/Elephant_Gun.png/230px-Elephant_Gun.png