What would your friends (parents and teachers) think of you if you said something mean to someone on the Internet? How would that make you feel?

What would your friends (parents and teachers) think of you if you said something mean to someone on the Internet?  How would that make you feel?

 My friends, parents and teachers would think that I really don't have a heart and i'm a very mean person and I really don't care about a lot of stuff. It would make me feel low, like why would I want to say something mean to a person.