How to respond to someone plagiarizing my work? I have recently come across a paper that copy-pasted entire paragraphs of one of my papers which is already published in an international journal.  This paper appeared in a journal which is not very popular, and I did not get a courtesy citation.

How should I proceed with this?  I was thinking of reporting the issue to the editor of the journal where the paper appeared but then I thought that it may not even worth the effort. On the other hand, I still have this in my mind since this is clearly unethical behaviour.

What would you suggest?
I would definitely contact the chief editor of the journal and place the evidence before him/her/them. Plagiarism should not be taken lightly. There is a tendency to be lenient when it comes to self-plagiarism of non-critical parts of the text, for example, parts of methods sections (in experimental work). Regardless where one draws the line, copying sections of text verbatim from others is a clear breach to me. 

Anyway, it will be the editor's job to pursue the matter after you made the point. If the journal belongs to a publishing house they may receive legal help to deal with the author. If the editor does not react and there is a clear publisher behind the journal it may be relevant to bring it up a level. If you have someone in your university working on copyright issues, perhaps at the library, then you could also talk to them. They may be able to provide further assistance and help evaluate the case.