In psychology, extinction refers to the gradual weakening of a conditioned response that results in the behavior decreasing or disappearing. In other words, the conditioned behavior eventually stops. So in order to get their behavior extincted you should stop reacting or responding to such things so that behavior eventually stops i.e. gets extincted.
In negative punishment, you remove a pleasant stimulus to decrease a behavior, in other words we can say that taking something away that makes them feel bad. So trying to take away that it meant for them in the workplace or doing something that suits the negative punishment definition would be advisable. At times using negative punishment is good and sometimes it is bad, it is wise to chose when to use and when not to use.
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Choose one of the perceptual distortions discussed in the chapter readings (stereotypes, selective attention, halo effect,...