Is it ethical, reasonable, fruitful and/or Ok to post links to your SO questions on sites like Hacker News and programming - Reddit, to get more views by programmers and thus more chances to get answer (quickly)? Also, Will It be taken positively or a greedy and desperate attempt to get answer quickly ?
Absolutely. StackOverflow actively encourages such behaviour by offering you badges for bringing in visitors too!
See the Announcer, Booster and Publicist badges; just make sure you use the link provided to you using the
It's not a matter of ethics, as long as you're not doing mass flooding.
Reddit is designed for posting links to special and interesting resources. So, if you question is very interesting, why not? But, if your question have no answers and low number of visits, this is propably not the case and you'll get no visits from Reddit anyway.
So, as for me, it makes sense for interesting questions with high number of views and no answers or little helping answers. Such questions ARE interesting, but there's lack of experts who could answer it. Such portals could attract some experts to StackOverflow.
But, if there's no interest in your question, they'll be ignored on Redding in the same way. You'll be better off publishing links on your blogs, at least you'll get some bonus to position in google search (Digg's etc. are setting