If a wrecked, derelict, mutant infested, radiation bathed sinkhole of human corpses that is Chernobyl isn't special, than nothing is.
alanschu: imho established history doesn't matter much when a, they didn't bother gathering every info there is, and b, they retcon it anyway.
you are forgetting that FO3 is in different part of the world than FO1 and 2... Going very close to anything that happened long time ago and few hundred miles away would be ridiculous... Because most of the people in FO universe (the people in vaults namely) do not even know that there are any people living outside their vaults...
In other words... the games are in same universe but in different settings...