Just a thought
The introvert who grew up all alone, whose world centered around himself or herself barring parents right from childhood, is unlikely to understand the meaning lonelines. It's a kind of permanent relationship that develops between him or her and lonelines since that childhood period. He or she is likely to answer any intervention from outside world or the dictates and dogmas of society with coldness and disdain. If you call this unsocial , then the upbringing practiced in most nuclear family is unsocial. Lonelines is addicting and is different from being lonely or left out. Once the skin gets used to it, it will never come out of it.