The Satoshi coins can be publicly destroyed so they will never be spent. Transfer them all to an address like 1BBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBB. This is much more trustworthy than leaving it in doubt whether the coins can ever be recovered or not.
Well, in the "scorched earth" scenario, it would be more accurate to say that they "could have been" publicly destroyed. It's not clear to me why public destruction is necessarily a part of abandoning the identity. I don't understand what you mean by "trustworthy", though; if the identity is abandoned, then what's to trust?
