pyzicslolito said:
Do you think people must respect you if you respect them

Did you ever show them or make them understand that is your class ? This shouldn't be too harsh, you can offer them some work to do 10-15 minutes after the class starts, for example to keep them in time for their classes,more...etc. I used to take a math class that i had to do my 20 min test every day
I think that as a student, it's absolutely ridiculous that you need to be "shown" how to come to lecture properly. These are not signs of respect, but general skills of maturity and adulthood. It's not respect to:
1) come to class on time, or even a tad early and sit down quietly
2) pay attention or at least, be quietly doing something else college related (ie working on problem sets if the material of the lecture is boring to you)
3) ask questions in a well thought out and concise manner
And to not:
1) eat in class unless the lecturer says otherwise (some are upfront in not caring about this, I had a late in the day calc course where she gave us 15 minutes to snack on something as a break)
2) talk out of turn
3) be on your phone/texting/gaming on your laptop/whathave you
I'm sorry, but my mentor when I did my research internship put it best
"I don't like teaching the freshman. They come into my home, my lecture hall, and act like they own the place. Feet up on the desks, chomping loudly on their food and completely devoid of any interest in the class"
This is just basic adulthood. Now, respect can be addressing your professor in the proper manner, respecting even their most trivial wishes, going out of your way to make their lives a little easier, etc.