You know, I don't feel particularly bad for these folks. Contrary to the thread's title, it wasn't so much 5 years for possessing 10 tracers but 5 years for being in violation of the law. It just so happens that 10 tracers was how he was in violation of the law.
Granted, I think the law is stupid. I think a lot of laws are stupid. I think some of the laws in my state are stupid, but I try not to violate them as I know there are very real consequences and I try hard not to be in violation of felony laws.
You gotta obey the law of the land. If you don't, then you need to be bright enough or clever enough to not get caught being in violation. I feel no sorrow for folks who choose to live in a state with openly unfriendly gun laws and who violate those gun laws and are dumb enough to get caught.