Let us explore ways of being a dick.
I sometimes like to deface novels I don't like with the words "[character] dies" written on or near the first page.
I also like to leave very long pauses before responding to things people ask me.
I couple of weeks ago at a gig a band played who didn't impress me one bit. So I situated myself very close to the stage where they could all see me and whenever they finished a song, I stood, stony faced, arms folded, watching them back.