Why are people so keen on telling you you have something that isn't "right"? If we were really civilized we wouldn't need to point out other people's flaws all the time, we would see them and keep it to ourselves. By showing them we noticed we're just interfering with their personal space, making them feel uncomfortable and nothing good can come of that.
If someone has a limp or a hunchback, if a person is blind or deaf, we don't tell them that. Socially it wouldn't seem right to state something as obviously hurtfull. Things that aren't as important can also cause pain. Let's begin thinking about our own little flaws and mistakes and understand that we wouldn't want them to be noticed by the whole world. Perhaps that way we can start being better people.