I was recently out to dinner with a friend at a local mongolian BBQ. The nature of the restaurant is loud, noisy, busy etc. However, at the table next to us was a Mom & Dad with 2 small kids. The little boy was probably right around 4, he was loud, obnoxious and just not well mannered. The parents ignored him, they let him climb around, bump our table etc. I spoke to the father and asked him to control his kid so that he stopped bumping our table. The father told the boy to sit down and
that little boy put his butt on the chair, his feet on the table and kicked the table over 
Glasses broke, food splattered, soy sauce went flying etc. The parents waited for staff to come right the table to clean up the mess. Noting was said to the brat or the parents. The management just cleaned it up and the kid went back to climbing, bumping my table, mouthing off, singing, talking loudly and harrassing his sister etc. I got our waitresses attention and asked to be moved. IMO those parents should have been asked to leave. I told the manager on my way out that I thought they should have taken a stand, he agreed but they didn't and I won't go back to that establishment.