And while I have not been able to confirm this, I suspect that From Holland to Kurdistan has switched their blog to invited readers only because of a similar reason, as their site (and their Dutch language news-site) has had problems from hackers in the past.
Y aunque no lo haya podido comprobar aún, sospecho que From Holland to Kurdistan cambió su blog a la modalidad de lectores invitados por una razón similar, pues su sitio-web (y su sitio de noticias en holandés) ha tenido problemas con hackers en el pasado.