Bear in mind that the content on the entire Stack Exchange network is licensed under the Creative Commons Attribution - Share Alike license, so others are allowed to copy and reuse the content as long as they attribute it to the source correctly.
The team have previously defined exactly what they expect of someone reusing the data to do:
Let me clarify what we mean by attribution. If you republish this content, we require that you:
Visually indicate that the content is from Stack Overflow, Meta Stack Overflow, Server Fault, or Super User in some way. It doesn’t have to be obnoxious; a discreet text blurb is fine.
Hyperlink directly to the original question on the source site (e.g., http://stackoverflow.com/questions/12345)
Show the author names for every question and answer
Hyperlink each author name directly back to their user profile page on the source site (e.g., http://stackoverflow.com/users/12345/username)
By “directly”, I mean each hyperlink must point directly to our domain in standard HTML visible even with JavaScript disabled, and not use a tinyurl or any other form of obfuscation or redirection. Furthermore, the links must not be nofollowed.
The page you've referenced appears to do all four, and I can't see any nofollow on the links, so to me this appears to be a valid reuse of the source question.
Here is the Meta Stack Overflow question that covers attribution issues (what I've said here mostly repeats that). The second answer there can be edited to add in any site you find that is breaking these rules (otherwise, consider emailing the team or posting on meta).
