PEDs are an issue that encompass the majority of sports. Unless the boxing organizations can come to an agreement on how to approach the issue, the sport will continue to be riddled with conjecture. As with other issues in boxing, though, they've demonstrated that they're incapable of coming to an agreement.
Who knows who is 'juicing'. All performances should be scrutinized - and, after many years of refuting allegations, look at how substantial the scrutiny of Armstrong turned out to be - especially if there is reasonable doubt. All sports, not just boxing, are in need of a definitive system. Alas, that doesn't exist, and the organizations still wouldn't agree even if it did, so we'll just carry on with the conjecture for a very long time.