I don't disagree, for the most part, with what you say however I'm not just talking about gun rights. I'm talking about all of them. I'm talking about things like what the TSA does to people when they travel that never seem to get much attention. Remember the guy that wouldn't let them "touch his junk" and got prosecuted? I'm talking about the ridiculous amount of taxes we pay now and the fact that despite what Obama has said, they will be going up for all of us. We are taxed much higher than they were before the American Revolution. How about the fact that we will all be forced to purchase health insurance whether we want to or not? At almost every turn the Constitution is being either twisted or ignored to suit whatever agenda those in power choose to pursue. The current administration seems to be the most blatant offenders yet. Heck, you don't have to look very far to find data pointing out some pretty sickening voting irregularities that occurred during the last presidential election.
You make very good points. Short of soldiers or government agents firing on American citizens who are exercising their rights, be it peaceable assembly or free speech etc., I dont think the line has been crossed. By that measure Katrina was one of those examples.