Sure, that's the ideal, but that's not the reality on the ground. People treat logins to websites like it's a guarantee of privacy, and it's just not. Maybe once we have standardized and widely used end-to-end crypto (keybase), have some real authentication (extension of end-to-end crypto), and take computer security seriously (stop using C and C++, to start) we can start to consider things communicated via the Internet to be private. But we're not there yet and we need to get across to people that if you put your name and photos up on a dating site, that information is public and you should be prepared to deal with the consequences.