The difference is the ability to follow through with the threat. If someone sends you a mail, they have your address. If someone does it over twitter, they pr

The difference is the ability to follow through with the threat. If someone sends you a mail, they have your address. If someone does it over twitter, they probably don't know where you live. Are we going to throw 5 year olds in jail when they tell an adult male they hope they die? No, we're going to apply the same level of doctrine, how likely is it that the 5 year old can carry through with the threat?