Just tried to submit "SpiderDuck: Twitter's Real-time URL Fetcher" from its blog ( http://engineering.twitter.com/2011/11/spiderduck-twitters-real-time-url.html ), which seemed quite interesting, and got the infamous Stop spamming us. You're wasting your time.
After reading PG's explanation of the message ( http://news.ycombinator.com/item?id=2660975 ), it seems that twitter is a spam domain. Which I get, as submitting twits to HN can be really frowned upon.
But their engineering blog? Seemed like a bit extra-careful design to me. What are your thoughts?