I think being well-dressed has a lot to do with it. I feel powerful when I feel safe, and I feel safe when I'm dressed well.

I used to feel powerful by tricking creeps on 4chan into downloading a trojan by telling them it was a webcam viewer for some girl. They'd run it and I'd spy on them, then after a few days, take over their keyboard and mouse and start messing with them. Talk to them through input boxes on websites they were visiting.

It was a stupid teenager thing to do, but it did make me feel powerful.