As one poster alluded to this has been discussed. IF you alter a boarding pass you could be charged with forgery, etc. IF you do the process described by purchasing another ticket that is not SSSS then you run the risk of being charged with interference with the screening process. If you have both BP's on you, then it would not be hard to prove that you did it. Besides that, there is a civil penalty and you could end up on a no fly list. Is it worth it?