Parents can promote good choices from a young age to prevent you from having struggles in your life, parents also just being there is not just good mentally but emotionally,having parents at home to love and support you through out your life is a burden less that you struggle with and a good push in the right direction
The researchers kept their identities secret because, if they had revealed that their purpouse was to conduct an experiment on the behaviours of the people in the bar, it might have triggered that some people changed their usual attitudes because they know that their 'figures' will be kept in a record.
Maybe some people will drink less as they feel embarrased if some other person is testing how many beers they end. Others, might want to prove themselves 'strong' and drink much more than usual. People change their behaviour sometimes when they are aware that they are watched. This is called the observer effect.
