Was heading into the parking level of the apartment complex I live in this afternoon. As I walk in, a bloke about my age and what looked like his elderly parents were heading the opposite way. Said G'Day to them as we passed and I only got a response from the oldies. The young bloke was just eyes straight ahead to avoid eye contact. Then once we were about 10 metres apart I overhear him saying to his olds "Why did you say hello to him?" Have to say this stopped me in my tracks and I had to look back. Since when is acknowledging a simple Hello bad form?