Militia is a reference to Organized, State-sanctioned Militia; not Cletus and his band of degenerates getting together to prepare for and/or fight a perceived tyrannical Government.
You can act like you're forming or militia, and/or actually form a militia, that's not an exercise of your Second Amendment Right, that's just an exercise.
I was discussing this with an acquaintance today, and they were telling me that they're going to rise-up with millions of other patriotic Americans and fight the Government, mind you, he looked like he can't seem to fight his way away from a box of twinkies. My point is, the Government has professionally trained troops...the average American who is looking to form a militia, better get physically ready, inn the event they may have to cash the check their mouth wrote. My prediction will be: Most of the 80 million firearm owners will sit down, and shut the heck up if (it won't happen) the Government came knocking on their door to confiscate their firearms.
Or they will go out like a non-patriotic punk, like, for instance: Jimmy Lee Dykes. He comes out from his homemade bunker, shoots a school bus driver, takes a kid hostage, all because he thinks the Government is coming after him. It makes me wonder what would have happen if he was able to get together a militia. Perhaps they would have taken the whole school bus full of kids.