Cameras cryptographically signing all photos and videos should become the standard. Media that cannot be traced back to real camera hardware should a priori be considered fake or tampered with.
Still, deepfakes are partly a social problem and, as should be well known, social problems can rarely be solved by technological solutions.
How about we undo the radical individualism that has rotted out any compassion and empathy from society in the pursuit of greed? Not as easy to do granted, but it's a social technical debt that can't be quick fixed.
You sound like you've given up on nurturing humanity and instead want to enforce good behaviour as if the base human condition is to hurt others by default.
These are often young boys behaving in ways that are misogynistic and heartless. Usually following the examples of heartless parents and peers. We can do better. They're kids learning the wrongs lessons about the world.
I think you meant to say: a single eastern European teenager who gets bored one weekend. These systems have been around for decades, and they've continually been hacked for decades too.