^^What they said.
You mean like this?
Section 26. That the citizens of this state have a right to keep and to bear
arms for their common defense; but the Legislature shall have power, by law, to
regulate the wearing of arms with a view to prevent crime.
Source: The Constitution of the State of Tennesse, Article I, Section 26.
You seem to be under the mistaken impression that legislators only enact laws according to law, or the Constitution. They ignore both.
You also seem to think they care about facts. If they did, there would never have been an assault weapons ban, "gun free zones," or the new health care bill.
I know it seems like I'm picking on you, but it's the lawmakers who I am picking on. Fortunately, even in a batch of rotten apples you find a few good ones. I do hope we see more laws like the ones you pointed out though.