To be honest I can't really say the social worker was entirely wrong. For a teenager with raging hormones, self loathe and dissatisfaction with their current circumstance it might be best to let him lose some steam and then steer him back into the right direction. When you think about it in a simple way the social worker got a troubled teen out of his shell, no more fights with his family and the motivation to find work to pay for his hobby. All of this in turn helped society and the teen as long as he reminded the kid to use protection then there really isn't much of a problem. You can tell Da Da really wanted to report the social worker, but that is why 投訴文化 is so prevalent in HK. People think they are on the moral high horse and have a duty to right what they perceive as wrong.