Say you’re doing a web search looking for some information. In the course of this research, you find a cached copy on Google of a published article from a recently-demised business weekly. The author of said article (a college professor, professional writer, and former Libertarian gubernatorial candidate in a certain southern state) might very arguably have plagiarized your work, quoting some passages almost verbatim and all without attribution.
How exactly do you express your displeasure to this individual? He was presumably compensated for his “work” and, given his profession, should presumably “know better”. Is it worth seeking him out, if only to let him know what an asshole he is?