Some people become so upset when they are insulted, that they repeat the incident to others who would otherwise not know about it! By giving the matter additional attention, you are causing yourself additional embarrassment!
Sources: Rabainu Yonah to Mishle 12:16; Rabbi Zelig Pliskin’s “Gateway to Happiness,” p.298
Interestingly enough, thanks to sharing, retweeting, and reblogging, insults get spread all the time, spreading outrage and indignation to epic proportions, even when the original event might have been relatively minor.