I can think of lots of destructive hobbies, bungie jumping, base jumping, snowboarding, cliff diving, etc... But making your own primers tops them all.
With the others persuits it only involves personal destruction. But by making primers at home you would be putting your family and your home at risk. That seems like the apex of irresponsability. Unless your trying to teach home grown terrorist on how to make high explosives.
"Socialized Medicine is the Keystone to the Arch of the Socialist State.” -Vladimir Lenin
"I predict future happiness for Americans if they can prevent the government from wasting the labors of the people under the pretense of taking care of them." - Thomas Jefferson (An early warning to Obama care)