You can already do that today to fool basic image forensics. Security is never absolute, but if you make the hassle big enough it might suffice to protect the general population. Just like almost all smartphones don't let you mess with the wifi card or spoof your mac address unless you root them. If that wasn't the case, you'd see way more hostapd-wpe attacks these days, since every kid could do it.
In the case of image trustworthiness, it might actually be better for it to be accessible to the general population, if it's doable at all. Then the public knows that images are unreliable evidence.
