However, the biggest problem is finding such users. HNSearchAPI is not complete (for instance, fogus is not listed when you search for "twitter"[1], but is when you search for "twitter.com"[2]).
Which requires quite a lot of crawling (the unnofficial api helps sometimes[3], and sometimes it doesn't[4]). And HN robots is quite restrictive[5]
However, the biggest problem is finding such users. HNSearchAPI is not complete (for instance, fogus is not listed when you search for "twitter"[1], but is when you search for "twitter.com"[2]).
Which requires quite a lot of crawling (the unnofficial api helps sometimes[3], and sometimes it doesn't[4]). And HN robots is quite restrictive[5]
[1] http://www.hnsearch.com/search#request/users&q=twitter&#...
[2] http://www.hnsearch.com/search#request/users&q=twitter.c...
[3] http://api.ihackernews.com/page
[4] http://api.ihackernews.com/post/3118358
[5] http://news.ycombinator.com/robots.txt