There have been several instances of plagiarism on this site. I will not tolerate any of it. If you are going to copy and paste something from another site, give credit. Just write a sentence at the very beginning or the very end of the post that says something like "Source: <blah>". It's not that hard at all.
Even if you do not claim credit for yourself, if you don't give credit or cite the source, it is still plagiarism.