Whistleblowing is incompatible with current child porn laws. In several countries (Brazil, where I am from included), the law is that possession of child porn,

Whistleblowing is incompatible with current child porn laws. In several countries (Brazil, where I am from included), the law is that possession of child porn, for ANY reason, is a crime. It means that trying to give evidence to the police, will get you in jail, even if the police doesn't want to arrest you, they have to, because that is what the law says. Things get worse in certain countries that went along US child porn laws and ignored local culture and laws regarding related areas (for example, in Brazil age of consent is 14, and in some Brazillian regions marriage at that age still makes sense, usually due to harsh geography of the area that make it necessary, cue lots of young couples surprised when their personal photos are considered a crime...)