I want to offer some free content to people, but of course I want their "best" email. However, I notice that people can register with a fake email and dummy names. Wich is why I would like to have two factor authentication or some other system to secure the quality of the emails. How to do this?
While we have had requests for two-factor authentication, this is not something we are actively looking into as it is felt it will actually deter more sign-ups than intended. Ultimately those people who wish to create dummy accounts will still do so based on their intent. If need be, we do have CAPTCHA available to dissuade spam bot account attacks but again this won't deter the individual intent on creating a dummy account.