You really underestimate scammers. If you create a popular social network and there is money to be made, they'll find a way. They'll visit a developing country and pay people $5 to hold a fake ID card for a photo or video. Paying $5,000 for 1,000 fake accounts isn't a problem for them, because they'll quickly make that money back selling likes, followers, or pushing advertisements.
This quickly changes the premise of your service from a verified social network with content written by real humans, to a social network with mostly real paying users, some fake paying users, and any content you see may or may not be written by a bot. Is it really that different from other social networks at that point?