Monkey see, Monkey do and we all enjoy what Monkeys do!
As much as we like to say a majority of our learning is from textbooks I think we can all agree that most of the things we learn through life is by watching others. That's where Social Cognitive Theory(SCT) comes to play. SCT stems from observational learning theory and is based on individuals learning the behaviors and results of others by observation(Bandura 2002).
According to the article "Increased computer use by adolescents cause for concern" talks about how researchers have found a strong correlation between computer and internet use and risking behaviors such as drug use, unprotected sex, etc(Increase computer).The article stated that the number of exposures to said behavior determines the likeliness of the behavior being imitated . In there research they said "adolescents are exposed to considerable screen time--over 4.5 hours on average each day--they're constantly seeing images of behaviours they can then potentially adopt."
So, It's easy to say that if 4.5 hours is enough to for someone to adopt a behavior then being exposed to over 15 years of an behavior is enough to create a lifestyle. I devoted my life to becoming like Giga-man. Spending over 131,400 hours of someone's life and tell me: "At what point could I and those around me not tell the difference between us?"