I sympathize with your friend. If I don't blow dry my hair and I go outside, it just kind of goes everywhere this time of year.
I can do one of two things:
Pull it back: the lazy method; usually this is what I do when I have no place to be. Although a jaws clip plus my new Hawaiian flower hair clips for some reason makes people think I took time to do my hair, when in reality it took me 5 minutes
Blow dry it and add some product: that way, when it curls (because it will curl), it's not frizzy, and the curls tend to be bigger and fewer rather than a lot of little curls.
I have to do either one of those two things. Otherwise, it'll just be everywhere. Recently, it's been getting pulled back a good bit. Humidity+long hair really doesn't go together.