I think you answered your question on your own - it's all about psychology. You need to govern your mind in a fashion that it should hear and pay heed to only those things that matter. Others should pe passed by as if never seen or heard. There will be people around us all the time saying things we won't like and appreciate. If we keep answering all of them, imagine the amount of time we end up wasting.

It's best to just ignore such people as if they are nothing and continue your life like nothing happened.