The rudest thing a person can do is to ignore others. When people overlook others’ feelings, it not only shows their selfishness but also shows no respect to others, such as cutting in line, talking very loud in public and interrupting a conversation. Everyone has the right to not being disturbed, and no one can deprive other’s right. We should take other’s existence in account.Therefore, the rudest manner is people’s ignorance, which is a bad behavior that everyone should avoid practicing.