A Canadian or British writer said it best a few months ago when the issue of testing came up.
You only have to test one player, Tiger, if he comes up negative it doesn't matter what everyone else is doing, they can't beat him anyway.
Its unfortunate society today questions the credibility of someone who wants to get tested voluntarily to set a precedence. The same thing is happening to Dara Torres in swimming. The culture of modern day sports in relation to performance-enhancing drugs is 'Guilty until tested Innocent'