There is no area of human endeavor involving competition that's completely immune from scandals. There will always be people who are willing to go to great, underhanded lengths to win even the shortest race. That's just human nature.
Still, it's a bit unsettling to see an arena you expect to be above the fray get embroiled in a cheating scandal. But if you would expect the big brains of the chess world to not sling some mud, you've got another thing coming, as a particularly nasty accusation has put the relatively quiet, sedate game into the spotlight.