Playing chicken with a car is suicidal at best... It might not be as easy as it seems sometimes in a split second with too little time difference to judge just how fast the other guy's going.

Better idea is to just scream "OWW!" if someone passes within inches of you.

Easier to swerve into the way to block a car going with you (as in taking the lane) where the speed difference might be 30-15=15mph rather than 30+15=45mph.