Like you, I too got attracted to the words, 'content rapist'. I stumbled on to this somewhere in the web and that too long ago. Suddenly I remembered it and thought in what context the term content rapist might have been used!
I could think some of the following popular internet marketing strategies:
* Using PLR and rewriting it
* Autoblogging software
I could accept the rewriting of PLR content to some extent but never the creation of blogs using automatic blog post. It can be termed as content raping.