I have to kick this in and ask, Exactly when did we all become so helpless that we need to rely upon the 911 emergency services to come and bail us out because we had a knock on our door?
The first one to call the cops is considered the victim 99% of the time by first responders.
Also, it wasn't the knock on the door that would get me to call 911, it was the fact that after the knock there was no answer and then it happened again. That usually means that a person is trying to get you to open the door without seeing them - they are there to cause trouble.
It doesn't hurt to call the police. Exactly why do you think that calling them is asking to get "bailed out"? That is not my intentions when calling the police. I would like them to show up before anything goes bad, but they are not there to bail me out. I am confident that I can take care of myself better than a police officer can.
However, I would love for them to arrive before I have to engage an assailant because it would save me a lot of money in legal fees...
I guess if you live where there is a Calvary to come it might be a viable remedy. Out here where I am the cop is probably 30-45 minutes away if both of them are on duty that night.
And what exactly is the harm of calling them to get them on their way? If it turns out to be nothing, you will still be on the line with them and you can apologize and explain the situation. If you have to shoot, then at least law enforcement is already on their way.
I understand that when seconds count the police are only minutes away...but some people actually use that as a reason not to call the police? That is missing the point of the statement.