Rant Time!!!

OK..we are at a local breakfast/lunch place in our community. There is a group of people waiting to be seated and we see a man looking in the door assessing the situation. He leaves, a few minutes later I see him come in the back door and he and his friend seat themselves at an open booth. Ok..clever or just rude? I know how I feel about it, I was waiting and it was supposed to be our table. OH..the restaurant staff knew what happened and chose to just let it go.