If both parents have office careers, I scold the children for either browsing the web or playing video games. I want the office left open for the parents to advance their careers and it drives me nuts when they can't do it because the kids are playing video games
Banging dishes is the other one that I scold for. Otherwise all the other 'child' activities I leave them alone, at least they are outside having fun and not sitting on the computer like their parents :P