Some live life looking for others whom we can judge as beneath us.
Others live life as a thrill ride where what others do or wear has no bearing on our own experiences because we're having far too much fun doing what we're doing to ever worry about whether or not other people are dressed appropriately.
I will say this: if I ever I allow what someone else is wearing to "cheapen" my own experience (whether it's a wedding, a fine dining establishment or a day at the beach), then I'll have given far too much control of my own happiness over to what other people are doing.

I'm confused by the outcry shown in this thread
I have read numerous and similar threads on the DIS....from formal nights on a cruise.....to dress codes at the nicer WDW restaurants (like sweaty theme park clothes & baseball caps on men at the highest end restaurants like cali grill) and I can understand someone being aggrivated when others dont dress appropriately.
The OP was just doing the same-when a slobbily dressed person went to a country club wedding.
And unlike what someone said previously-it is totally bad manners to purposely ignore dress codes-like at a Country Club-and expect staff to kick guests out. of course thta wont happen-and the slob gets away with it.
