This is one of the most important skills to master in order to be obnoxiously anti-social. It's also a useful ability to have when you simply don't want to talk to anyone or want to avoid talking to a specific person (though it seldom works as a stalker deflector).

It can be done with varying degrees of intensity. The low intensity end of the spectrum involves scowling at nothing and perhaps minor pacing accomplished by shuffling your feet. The more intense approach is to scowl directly at everyone who passes you and stand fixed to one spot, preferrably with arms crossed or employing some other variety of defensive body language, while the latter works fine on college campuses, it would be ill advised in a biker bar or a bad neighborhood.