Alternatively, a person controlling the Orcish race can obtain a Blademaster and harass. His primary attribute is Windwalk which allows him to become invisible and on breaking invisibility, doing extra damage to the victim in subject (this is similar to a rush in some aspects, mainly targeting workers harvesting resources or buildings in low levels of completion). When done properly, a blademaster harass can completely put the victim out of sync and low on resources, which consequently may lead them to play a poor game or leave the game entirely.
Dude 2: "Uhh, you killed one peon dumb ass."
Dude 1: "stfu".