It could surely be should a player grab ahold of another players snood and drag him full force to the ground when running. I can see why it's banned, better safe than sorry.
They need to ban Jonas' hair as well then...
Well, no. That's a pointless comparison. It's not about the pulling down, it's about what might happen to the neck. Obviously it's a one in a million shot that something bad might happen, but understandably, why allow there to be a one in a million chance just for players to wear something they've not even needed in the past?