Waiter praised for refusing to serve insensitive guests

I love that this waiter took a stand in such a classy way. He didn't make a scene, he didn't use foul language. He simply refused to serve them.
You can read full article here but in short, the waiter was serving two groups of people one night. group A had a kid with downs syndrome with them that was making a lot of noise. Group B complained so he moved Group A to a table further away....and that's when group B dropped the line  'Special needs children need to be special somewhere else'. So he took a stand.