Do I really have to take orders at the drive thru window? I'm going to refuse them.
Why would you refuse to do your job?
I don't think that I ought to be treated with disrespect.
Its messed up to refuse to do your job. Dealing with rude customers is simply part of the type of job you have. You are hurting the business you are working for more than anyone else if you refuse to take any more orders.
I'm gonna refuse to take their orders.
If customers complained about your behaviour you might lose your job. You're paid for doing your job, it doesn't matter how customers treat you. You're expected to fulfill your assigned duties.