Louisiana is once again hosting a tax-free weekend on August 3-4, 2012 and I was reminded of that when I went to my local gun store today. They had this sign standing out front.
There is certainly nothing wrong with avoiding sales taxes when legal, and the state of Louisiana makes it legal twice per year. If you're a Louisiana resident and contemplating a big purchase, you might save a few bucks by waiting till the weekend to make your purchase. Just sayin'.