The robots.txt you see now is probably the one on the server "parking" the domain, and not that of the original site.
A "site:kuro5hin.org" query shows results, so I'm guessing the original one isn't a block-all.
A "site:kuro5hin.org" query shows results, so I'm guessing the original one isn't a block-all.
http://web.archive.org/web/*/http://kuro5hin.org
All that lost content...
Still enough for TWBM to kill all its archives. It's ridiculous :(