Outrunning a cop

Is there really any point in outrunning a cop? Cops have video cameras mounted on the dashes, taping everything constantly. Even if you manage to outrun the copper, wouldn't you still get in trouble because he has a picture of your license plate? The only situation I can think of where it would make sense to outrun a cop is if you drive past him really fast and he doesn't get a chance to see your license plate. Alternatively, if you have some kinda of mechanism to hide your license plate from the camera; either a cover or a flippable one that give a fake plate.

Here are two videos of bikers outrunning cops:





And on a bicycle as well!:



Can I trust you as a friend/girlfriend/wife?Imagine this hypothetical situation. I get into my brand new bmw m3 and get on the highway and speed past a cop at 100 mph. What ensues is a 2-hour long car chase with 3 state troopers and a helicopter. In the end, I manage to get away and ditch the car. The cops know that the car belongs to me though because of the license plate. After I ditch the car, I run to your place and I say, "Will you be my alibi? I was just in a car chase and I am wanted by the police. However, they have no way of proving that I was the one driving the car and I am going to say it was stolen. You had picked me from my place and drove me here before my bmw was stolen. I need you to lie to the police and say that I have been with you this whole time." Can I trust you to stand by me and lie to the police until I am cleared of all charges? Or will you get scared of getting in trouble and rat me out? Can I trust you?