That's a shame. I hate to see parents act entitled like their kid deserves better other kids even though they should all be equal. That is true that is you have a uniform on you are still representing your workplace and can hurt their image with bad behavior.
People don't think their actions affect other people and those actions hurt other people. One thing that has came from her behavior is we are no longer allowed to take phone calls from the parents while we are in the classroom. Our time is suppose to take care of the children and not be hounded 4 times a day by this parent. So now we only get the lip lashing at morning drop off and pick up.