My first question on the site, so I hope it fits the boundaries of The Workplace.
I had recently read a horrific incident of the one Justine Sacco, whose professional & hence personal life turned upside down due to innocuous tweet intended as a joke. I have also seen many instances of people being fired from their workplace for posting offensive yet totally unrelated, to their work or company or industry, tweets/posts/blogs. I am definitely not talking about posting pornographic stuff against the law.
So, what justification should you give when you are about to be fired for an offensive comment you made online, to potentially save the job/to come out with a positive mindset? There can be numerous types of offensive content so I will narrow it down to religious, ethnic & racially offensive things.