Not only are some of us disrespectful of professors, but we are disrespectful of each other. In my opinion, we can no longer ignore this situation, and this sort of behavior should no longer be tolerated by professors, nor by fellow students. My parents always stressed manners when I was growing up, and I consider myself a considerate individual who is conscious of others' feelings and the effects of my behavior in group settings. I always believed that certain manners are common sense, which is why some behaviors are particularly disturbing and annoying. We are all tired of people who chat during lecture, or the ringing of cell phones and pagers in the middle of explanations of the Krebs cycle.
Some rude behaviors are a little more implicit, though.
Students who arrive early for lecture sometimes make it difficult for others to move to empty seats when they give an entire seat to their backpack ,which easily tucks away under their chair, or don't lift up their note tables to courteously let others pass. Some students save seats for their friends who never show up, or fill in the blocks of The Bruin's crossword puzzle instead of paying attention. As fellow college students, you'd think we would share some kind of bond or sense of community. Perhaps the competition and animosity among us has increased so much that we subconsciously treat each other poorly. We do live in one of the most self-centered cities on Earth, which probably doesn't help.