There is so much baseless hysteria about this subject. If society actually cared about this issue (spoiler, it doesn't), we already have all the required cryptographic tools (PKI, trusted timestamping, remote attestation) to create/record verifiably sourced content. Nobody really cares though. But people sure do like to whine about it.
"Nobody cares" is the important part. The most recent X-Files reboot did an episode on this. The age of conspiracies is over; governments don't have to kill people to protect secrets because they can just dump them in public and nobody has any idea what to believe anymore.
Indoctrinating children is the battleground. Kind of always has been though.