Warbler said:

What if it gets to the point where normal runners want to cut their legs off so they can use artificial limbs so they have a chance against other runners using bionic limbs.

LOL, thank you for this, I needed it.

My concern is that it hurts the integrity of the sport and casts a shadow over any disabled athlete who wins. They will always have an asterisk by their name and the next-placing non-disabled winner might be seen as the real, normal, winner. When one athlete is using an apparatus that another isn't, I think it sort of makes it a different sport in a sense. Maybe there will be a tennis player with bad elbows who uses some device to help him swing his arm (the strap thing Batman uses on his leg in TDKR comes to mind). The whole point of being an athlete or not is having the natural physical ability. It's sad when some people can't compete without aide - even Phelps is retiring at the old age of 27 - but that's the nature of it.