Earlier quoted context omitted.
And you know, from random strangers, who gives a fuck even if their facts are correct? You owe them precisely nothing for their “contribution” to your discussion. If you block them, it means you don’t want to hear from them any more. They can go butt into someone else’s discussion and see if they are more receptive to “corrections”.
I think it's nice to thank strangers who offer corrections. I'd rather be corrected than have a false feeling that I'm always correct.
Mr Stross seems not share that view. That's fine too.