This is the problem with people today... Those are NOTHING alike. If someone is physically bullying you, you cant stop them with anything besides outside help or a weapon. They are using sheer force to overpower you. When someone says something mean on the internet, you can choose to ignore them, you can block the person, you can quit the website, or you could just quit the entire internet since you're such a sensitive little bitch.... (you, plural. Not you, specifically)
People need to stop being so damn thinly-skinned and learn that words cant really hurt. If you let them, then I'd say the problem lies with your insecurities and not so much the people pointing them out.