These avoidance methods seem counter-productive.
A simple look of intense disdain to someone upon first contact (although requiring a little effort at first), puts them on the defensive, and then they tend to actively avoid eyecontact with you.
This saves so much energy and time in the long run.
Later, as need be, turning that frown upside down and paying them a compliment will endear them to you. Perhaps enough to convice to give this bad T-Back a yank and scream - NO Genius earns minimum wage and works retail!