> You are not entitled to behave as an insensitive asshole, in particular when people is asking you to stop. You can legally do it, but it doesn't mean it's morally right. There are venues where you can tell bad jokes to your friend, please limit yourself to doing it at those places.

I absolutely agree with this point. I'd just replace the last sentence with please don't put up private conversations of people with photographs and identifying information on Twitter or another public forum for everyone to see.