This is an interesting question. I coordinate an online program, and this comes up from time to time because of the anonymity of the online classroom. Because people cannot see one another and may not know a whole lot about the people they are in class with (depending on class size and type of class), there has to be some sensitivity training at the front of these classes to deal with issues of ethics and diversity. If an online class is on the discussion board and someone says a remark that could be taken as offensive to a particular ethnic group, it could cause issues ...
This solution debates if traditional classrooms and an online learning environment differ in their ethical scope in about 418 words.