You have a friend who has a strong online presence, and really seems to flourish when interacting with people over the internet. however, there is also a negative aspect to his behavior—he sometimes says things he should not, and speaks poorly about his boss, his job, certain family members, and some of his friends. he makes extremely tasteless and inappropriate jokes, including some that border on violence. you know your friend and you know he is not actually dangerous, but you warn him to watch his online behavior. he ensures you that you have nothing to worry about, because he only posts controversial content anonymously. what should you tell him about posting “anonymously” and digital privacy?