I agree that the law is unconstitutional, but the way to fix it is not by breaking it anyway.
Our freedoms have been eroded piece by piece over many years, and I would argue that the best way to get them back is not to try to go for them all in one shot, but to build them back up, piece by piece. Have a problem with the NFA laws? Alright...first let's get suppressors off the list. They lessen hearing damage and noise pollution. Then we can work or short barreled rifles, etc, and work our way up the list. I think it's going to be a long, hard, expensive fight to get the NFA laws done away with, if it can even be done. Regardless, I don't think think breaking the law is a good stepping stone toward getting it changed.