My 2 cents: I don't care if people want to exercise their 2nd amendment rights; just because I don't personally have an interest in firearms doesn't mean other people can't or shouldn't. Who am I to tell people how to spend their free time?
On the other hand, I am a firm believer in responsible gun ownership. If you own a gun, you need to recognize that it can be used to hurt or kill people; it's important to be mindful of that fact, and to handle a firearm the same way you might handle a sharp kitchen knife or a bow and arrow. The majority of decent, legal gun owners do all these things, but every once in a while I think people forget how much these guns can hurt people, because they haven't seen it happen themselves.
If you check out the
Wikipedia article on celebratory gunfire, it has some info about firing off rounds up into the air and what the consequences can be. Bullets that come up have to come down; sometimes, they come down harmlessly, near where they were fired--but sometimes, they come down on people and their property. Depending on the angle you fire at, bullets can arc miles away from where you are, so even if you're on a large piece of property when you fire, it's not a guarantee that the bullet is going to come down someplace safe.
According to the article, anyone in Texas who injures or kills someone with a stray bullet can face "serious felony charges." As someone who's only 21, I can sure as hell tell you that I would never risk becoming a felon for the brief adrenaline rush that comes from firing a gun like that. Having that on your record absolutely ruins your job prospects and strips you of a number of personal rights... I can understand wanting to shoot some guns with your friends, but it's important to consider the consequences of all the actions you take (even the non-gun-related ones).