This is true, sometimes attitude is everything. Some of these predators are very lazy and generally choose what they believe are easier women to take advantage of (it's not a cure all though, because a different type of predator seeks out confident women to try to break). I have not ever encountered these type of men because I'm Ace, but because I carry an attitude of "don't f*ck with me" and no nonsense.
It's a way of behaving that will serve your daughters very well, and since I assume your daughters are white women, I'm going to say I greatly appreciate that. I've met too many white women I've had to give lectures to about personal strength, niceness, safety, and boundaries.