Link to the actual page, instead of the blogspam version:
http://programmers.stackexchange.com/questions/203471/why-do...
Content curation is a tried and true technique that some people love. I like reading the SO articles by arstechnica because I don't have to sift through the whole thread _and_ because they are stable, so you know what you link to.
YMMV, but it is definitely more than just copying and excerpt and setting a link, especially as the orginal platform is involved.