To claim other people shouldn't wear certain clothes to certain events is in the mind of the person who feels that way.
All of you, or most of you, claim to be conservatives or libertarians and express a wish for less government intrusion into your lives but you don't have a qualm about telling other people how they should dress! What hypocrites. Either you are for freedom or you are not. Wearing what you wish for whatever occasion is the right of every individual in the US or the world for that matter. What a bunch of control freaks a lot of you are!
I'm 25, I'm a conservative libertarian, and I'm a heavily tattooed rock&roll guy. So let me chime in with my $0.02 on this one, for what it's worth to you.
Nobody anywhere on this thread is saying that we want government to mandate dress codes. It is SOCIETY that mandates them. Some things never change. My girlfriend often whines to me "why don't you ever let me pay for dinner?" And she gets upset with me when I say "because you can't, you're a lady and I'm a man", I will treat her and the situation with the appropriate respect.
As far as "un-Christian", please, don't be silly! Judging a person on how they dress for a certain situation is a fact of life. Would you hire me if I showed up for the interview in jeans and a t-shirt?
Furthermore, it is NOT restricive of freedom to think that people would have enough class to know that when I go to a rock show, I'm going to wear a black skull t-shirt, jeans, and a camo hat. But when I go to the Philharmonic, I am going to wear a suit, a tie, and nicely shined shoes. I have enough respect for myself and my fellow patrons to dress in the appropriate manner. And if you say "it's not comfortable!" well, then you need to get a pair of pants that fit properly. If you say "it costs too much to get a suit!" you can always wear dress slacks, a sports coat, and a tie, or remember that you are spending $55 a ticket, maybe you should go somewhere they do not expect you to dress a certain way (even if you aren't REQUIRED to).
Additionally, yes, wearing whatever you want whenever you want to is your right. You do have the freedom to be a classless, uncultured slob. You are free to be an idiot. I love freedom and cherish it daily. But the next time you aren't showing respect for yourself, let alone your date, or other people participating in the activity that you are underdressed for, that someone like me will be there, some "snotty, elitist, pretentious SOB", to look down on you. You may not be a bad person. And dressing in this manner won't get you shunned for life. But remember that the person mocking you could be a heavily tattooed, 25 year old guy in a punk rock band!
Get real! How does it feel to be schooled by some punk, tattooed, KID!?