I'm not sure what people expect-an Order of Protection will increase the penalty for an attack or allow prosecution for being in the area of the victim-but how could anyone think it'll stop an attack, or for that matter why do people think that the police will magically appear at the touch of a phone button.
Also for every one of this crazed stalker/murderer guys you have three women that have their husband/boyfriends arrested, get orders of protection then get back together with them, come to court with them asking for the charges to be dropped and the next weekend call the cops on him again the next time he -surprise-surprise- attacks her again.
A women's shelter attorney I talked to claims that on average women go back to the attacker 3 times before they finally leave.