I voted nay but honestly, my opinion on predalien "dreads" really depends on how they do it and if they explain why the Alien takes that trait. From the looks of the "dreads" on a predator, its not hair as its texture and appearance is smooth. So if there where to be an explanation on it as being some sort of sensory organ etc, then it would explain why it would be taken as a useful trait and it shouldn't be an issue. Of course it then depends on how its featured on the Predalien. Some look better than others.