I subtly use language coded language around people I don't like to make them feel like they're not in on something that everybody else is. I choose topics that I have in common with everybody else in the group, just to exclude them a little bit.
I tell people that work under me that all I care about is level of effort, and that results will take care of themselves, but I often do just enough to fulfill requiremnts so that I can waste time on the OG and other meaningless things.
I find out what people are sensitive about, and occasionally steer conversations toward that, so that other people will bring it up, so that I can defend them without them knowing I intentionally caused it.
When somebody hurts me, I hold onto it in the back of my mind, never really letting it go all the way.
I publicly praise my underlings to upper mangement, not so that they can reap the rewards, but so that I can be seen as a leader and advance my own career.
Similarly, I publicly take the blame for things that will do no real harm to my career, so my team will see me as a guy who covers for them.
I look down upon poorly educated people, as if it's their fault.
I have been brutally cruel to members of this site, just becuase their posts annoy me.
This doesn't even capture the shitty way I treated girls in my youth, for no reason other than that they were girls.