  The rise in online social networking has brought about a revolution in social
relations. However, its effects on offline interactions and its implications
for collective well-being are still not clear and are under-investigated. We
study the ecology of online and offline interaction in an evolutionary game
framework where individuals can adopt different strategies of socialization.
Our main result is that the spreading of self-protective behaviors to cope with
hostile social environments can lead the economy to non-socially optimal
stationary states.
