Copying free articles?

[Danielist18]

Hi
It seems that I am allowed to copy various articles on education or whatever else I need from websites like Enzine or other free article type website and then post them into my website as if it is my original content. But I am surprised this is allowed because I thought that one could not copy from other websites and include them into their own because Google, Yahoo etc. would then ban my site for copying. So how is this allowed, why is it okay to copy articles from these type of websites and use them into mine for SEO optimization? I am concerned and while I want to gain traffic quickly, and will do almost anything to get it, in the end being banned by major search engines is not what I have in mind.

Please let me know your thoughts…

D