Perhaps my post was unclear. The first two paragraphs were directed at the OP. I brought up social anxiety as a possible alternative to 'social retardation' in direct reference to the girl calling from the front lawn (and possibly even the intern opting not to make the cold call). It would be ludicrous to suggest that every person who has an obsession with their phone is suffering from some sort of anxiety disorder, but it was no more objectionable for me to offer an alternate perspective than it was for the OP to assume it was simply poor social skills caused by excessive mobile phone usage. There is no proof of either here.
I even acknowledged later in my post that mobile phones enable anti-social behaviour in social situations, but that doesn't mean I don't object to people assuming that young folks exhibit said behaviour every time they go out or that they just don't know how to socialise. It just wreaks of disconnected confirmation bias. At school, teenagers interact with their teachers, they interact with their coordinators, and they interact with each other. When they go to their friends' houses, they interact with their friends' parents or even their siblings. If they play football or cricket on the weekend, they interact with their coaches, they interact with their teammates, and they interact with their opponents. If they work part time in retail, they interact with their managers, they interact with their coworkers, and they interact with their customers.
I just don't buy it that young people don't learn how to socialise when most teenagers go to school and spend time with friends, or work, or participate in hobbies outside of that. From reading some of the posts in this thread, you'd think that young people just sit there like zombies attached to their phones or that they're incapable of having actual conversations. That just isn't the case and that's where my objection lies.