i think its much more important for someone to wear a pair of dress pants and white shirt when he is doing somethng that is not proper, like going into a treif store. if i saw a young man in blue jeans come out of kosher delight and a man in black slacks and white shirt come out of mcdonalds (both jewish of course) i would sooner set up the one in black pants for a shidduch then the blue jeans guy. after all, its not the midos and person that counts, its what they look like or what kind of table cloth they use etc.
the whole world has gone bonkers, manyare busy looking at clothes, cars, etc and ignoring the things that are most important like the midos and character of the person.
time to open up our eyes folks and see whats inside, not the gift wrapping..