Kristen Stewart looks over the throng of adoring fans, and scans for the Travis-Bickle-type with the mohawk and sunglasses:

This fear will abate when the movies are over, fame drains away, and the fans move on to someone else they will not assassinate. You might get 1000 fans to rush Ms. Stewart if they put Justin Bieber in a cage with a little of puppies behind her; even then, they wouldn't stop for any murder.