You aren't exactly the first one to think of this, but it's not a tactic that will help you that much. This is just like any attack run and can be avoided in the same way, either by guns or by maneuvering. It's the same thing w HO.s. How many planes do you think ive brought down by pulling up in the last second while he get a collision? But its the same thing there, the risk is apparent that you will be killed..