Too much solitude time without live contact is hurting happiness. The question is that whether this is just overdose effect like much of everything else or something extra beyond unbalanced life. My sense is the former. Nothing special against online. In fact for those without access it would be a dream coming through to have it.
The answer, in the peer-reviewed study of the online habits of girls aged 8 to 12, finds that those who say they spend considerable amounts of time using multimedia describe themselves in ways that suggest they are less happy and less socially comfortable than peers who say they spend less time on screens.”