One of the problems that people bring up when I talk about this is, they say, you know, if people start keeping all this data private, all those methods that you've been developing to predict their traits are going to fail.
Um dos problemas que as pessoas levantam quando falo sobre isto, é: "Se as pessoas começam a manter  estes dados em privado, "todos os métodos que desenvolveram para prever atributos vão fracassar".