Yes! If someone wrongs you you must respond. They have wronged you somehow in some way that you feel wronged. It may be a small wrong-doing, it may be a BIG wrong-doing. If it is small, let it go but keep note of it. If it is a big wrong-doing then you MUST do your best to kick their ass!
You must get even. In some instances this is as gentle as a quiet 'Sorry', yet in other instances you must gain revenge. You decide how.