Isn't attending Mass and participating in it the most important thing we do as a Catholic Christian? So why do we attend wearing picnic clothing, spaghetti strapped dresses, necklines so low to reveal cleavage, carpenter shorts, "Crocs", and the like? I recently sat in Mass watching an adult couple chomping down on their gum so adamantly that they appeared to have forgotten where they were....not in Mass! I couldn't believe my eyes as they both stretched their gum between their teeth, smacked, and chewed openly as two cows in the pasture. My children saw them too. What a great example if irreverence, disrespect, and complete lack of appreciation of what they were doing and where they were doing it.
I searched around to see what was said about this and other atrocities and I found an article written awhile back, but still very pertinent and timeless called, "Dress, Demeanor, Discipline Show How We Value Holy Mass".