Unlike online casinos and bitcoin casinos where everything is anonymous. On social networks it is easy enough to determine that the account belongs to an underage child.
You can't determine a social network account which belongs to an adult, teenager or an underage child. It isn't "easy" to know who are real ones and the fake ones. Creating accounts on social networks doesn't even need a verification in real life information, just a single click on email for verification.we are offered applications in the style of gambling.Is it legal?
What application is this? 
Sorry, but I am not able understand how this social gambling is working? I mean you usually need a central party that has contracts with the gaming software providers and manage the deposits and withdrawals, or is this somehow based on blockchain technology? 
