What's weird to me is that from a business standpoint he has nothing to lose by pointing out who has his real gear. The only people he would potentially hurt are people who are ripping off his product, and that's also a win for him, so I'm not sure what the hold up is. He can't "literally not know" like he claims, because he knows which seed banks he has supplied (unless he isn't actually producing the seeds in which case he really has no ground to stand on), and thus by process of elimination he also knows who is claiming to sell his product without ever getting his product from him. I think that what the problem is, for him, is that if he says who actually sells his stuff, then he can't claim that the bad stuff people grew was fake if they got it from a source he says is legit. He isn't trying to protect himself legally, he's trying to protect his upper hand in the argument.