Topic suggestions for papers on business ethics

A student logged in to chat last night and asked for help finding a topic for a business ethics class. The student needed to write a paper on some company that has been accused of being unethical. The student clearly had no idea how to begin to identify a company or a business ethic topic. The librarian suggested, among other things, this Google Directory page listing "allegedly unethical firms." While there are clearly many ways to get students started with finding a topic for such a paper, this particular one (the Google Directory page) was new to me.