So, to paraphrase : I've come up with some fictional scenarios, therefore end freedom. BTW, as a philosopher I don't care about the consequence of that thought chain and I am placing the onus on other people to come up with workable counterexamples to deal with my fictive narrative. Also, that I will be used as a justification for dictators is nothing at all to me.

The really great thing is that Bostrom still thinks / argues that nuclear weapons are "secure" and that there is a culture of security around them. That trope alone should rule him about of serious debate - let alone the howling gibberish about Sparrows raising Owls.