What happens longterm if you just quit having negative feelings?

"Blanking" people is a perfectly reasonable thing to do. Why should you respond to people who are attacking you? You might say it's a variation on turning the other cheek. Behavioral psychologists have a term for this - extinction. If you simply fail to respond to taunts, gibes and ridicule the offending party will eventually give up, but it make take some patience - some attackers are very persistent. You may need to calmly walk away sometimes.