I'm not going to give up my seat for any of the teachers
Are you serious? Why don't you want to give up your seat?
I think they don't deserve my respect
Even if you don't think they deserve your respect, people will still look at you weird if you don't give up your seat for an elderly teacher. They need to be seated more than you and you will be shamed for not doing it.
I don't care what anyone thinks. I get along just fine without doing it.
I just think you're being a little rude. If you are young then you're often expected to give your set up for your elders.