I've received intel from an insider source the FBI are uploading encrypted PNGs using a 0day attack vector onto Sup Forums and other dissenting boards.
This is in preparation for the upcoming leaks where there is some evidence to suggest the Director of the FBI is implicated.
Be extremely cautious downloading images for the next few weeks/months - the payload is delivered once opened on your hard drive.
It's your choice to take this message seriously or not, but this is the only way I could deliver this message without compromising my position.