How to be a Bully.....online?

Most people who are called bullies on-line are those who do not invest emotions into a disagreement.
If you have one side arguing and another just disagreeing, the side that is simply dealing in facts and ignoring the emotional side will be called a bully every time, and that is false.
A bully is someone who harms with intent.
As for humor, since acting was my major and we spent a lot of time dealing with the subject and I read a great deal about it... all of it is based in some form of sadism.
You cannot show or tell me on joke that someone, even the teller themselves, is not the brunt of the joke in some form or fashion.
So, if one person is joking, it is only a matter of degree, as far as how much of a "bully" they are being compared to the next person joking around.
The fact is, we disagree in here and each of us has a different way of expressing our sides... if you don't like the way one person does it... leave them alone. It is very simple.