Stealing copyrighted material without contacting or compensating the original author.
Wow, great poem, Dave! You actually wrote that?" "No, I cooksourced it from Billy Collins on the Internet to impress a girl.
When someone steals something of yours, then expects you to thank them for it.
"But honestly Monica, the web is considered "public domain" and you should be happy we just didn't "lift" your whole article and put someone else's name on it! It happens a lot, clearly more than you are aware of... If you took offence and are unhappy, I am sorry, but you as a professional should know that the article we used written by you was in very bad need of editing, and is much better now than was originally. Now it will work well for your portfolio. For that reason, I have a bit of a difficult time with your requests for monetary gain... We put some time into rewrites, you should compensate me! I never charge young writers for advice or rewriting poorly written pieces, and have many who write for me... ALWAYS for free!" -- letter to blogger Monica Gaudio over the theft of her article from the thief
Monica... ya dun been cook sourced.
Plagiarizing content and republishing it as your own, as Cooks Source magazine allegedly did to blogger Monica Gaudio, as recounted on her Live Journal.
Bonus points if you also tell the person you lifted the work from that they should be grateful to you for editing their original.
-Dude! You can't turn that paper into to your comparative web class. You cooksourced it from Daring Fireball.
--Yes, but I edited that jerks words and made it better, so it's all good.