Do you have to blanch shredded carrots before freezing them?

For several years I have just grated my carrots and put them in freezer bags without blanching. Like you do peppers, etc. They have kept well. When you don't need the whole bag you can just break off what you do need; they don't seem to freeze in a really hard block. Good for stews or whatever you wish, like carrot cake for instance. Very easy.