They stole 2 of Machida's best years with that bullshit.............But some of them where being responsible and listed what they took and maybe went to pengths to try to avoid tainted stuff, and then got tainted stuff in there products.
It's not like it was just them and they got a bad batch. USADA would test seperate batches, not only the one the fighter had put in their body, and those seperate batches, put on public shelfs would be tainted.
What about when you are being responsible and you get unfairly put in that scenario, that is tricky to gather.