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Is it legal to copy Stack Overflow questions and answers?

Well I just posted this question:

Dynamic height header in SEO optimized SOC (Source Ordered Content) layout using only CSS, no Javascript?

And then did some more Google searching to find a solution and stumbled upon this two blogposts:



Which appeared very recently after my potst here and have the exact same text... so they are obviously automated copies of my question...

The links on theese pages are also very weird. For example I cannot click the "Find the answer here" link under the post on "need programmer blog" ... but in source it looks nofollow...

also when signing up i dont remember anything about my questions beeing automatically replicated to other services. its okay for me and its i think legal as well but it should be at least mentioned...

marked as duplicate by waiwai933, Ether, ChrisF, Tobias Kienzler, Jon Seigel Sep 21 '10 at 4:23

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

migrated from stackoverflow.com Sep 18 '10 at 22:24

This question came from our site for professional and enthusiast programmers.

  • 1
    They're not official mirrors - they're just sites taking advantage of the CC-licensed content. – Skilldrick Sep 18 '10 at 22:24
  • I find it strange that you assume that stackoverflow has anything to do with your question being replicated. It's on the web you know... Anyone can see it and make a copy of it and call it his own website. It may be neither legal or moral, but stackoverflow doesn't have to have anything to do with it. – Complicated see bio Sep 18 '10 at 22:26
  • 3
    See here: meta.stackexchange.com/questions/24611/… – Jon Seigel Sep 18 '10 at 22:34
  • To get it that quick they must be using the API, or screen-scraping. If they're using the API they should be easy to shut down server-side (obviously this won't stop them displaying their cached questions) – Mark Henderson Sep 19 '10 at 0:04

They're unofficial sites copying the content, usually to make money from ads or for SEO purposes. Any content you post is licensed under cc-wiki (see the footer) and provided in the data dump and through the API.

As long as they fulfill the license's requirements and provide attribution, they're allowed to do this. (Here's a list of sites that don't.)


Both the sites you linked to appear to be violating the terms of the license, specifically the attribution requirement. The parent sites will probably honor a DMCA takedown request to remove the infringing material . See here for wordpress.com, and here for blogspot.com.

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