<< KBLB held a very public press conference >>
Nonsense. It was a one-way webcast. There were no press. There were no questions.
<< That is a proof. You can disregard it, but that and a PR are actual proof. >>
No, it isn't. It is a claim made by a company that has made 100s of claims and proven NONE. There has been absolutely no third-party verification that the technology even exists, let alone that it meets their claims. As a matter of fact, there hasn't even been ONE photo that KBLB can turn spidersilk into anything useful. There have been no photos of a shirt, a tie, a cap, a dress... anything...
There are those that claim that the Earth is flat. Does their claim constitute proof? No, it doesn't. Anyone can claim anything. Claims <> proof.