Hair pulling can be a very powerful move in rough body play. Not only because it can hurt and can be used to move a body very effectively but because it usually has a very strong effect on the psyche.
For some the feeling of having their hair pulled is too painful. Others love it and immediately slip into a submissive mindset.
If you wish to play with hair pulling, try it out with your partner(s) first and see how you do it best and how it feels for everyone involved.