How are the practices of the Freemasons not leaked by now?

You'd think that nearly everything about them would be leaked onto the internet by now. By a rogue member. Or an ex member that developed mental issues. Or just by anyone that's a rebel. And how have they not been infiltrated by such a person wanting to do so? I mean... You can post things on the Internet anonymously nowadays. You'd think this would have happened by now, with everything else getting leaked.