My Dad is an old teacher today and was formerly a farmer.
My view is he clearly understands these issues and has done since I was a teenager sometime in the last millenium when I followed him around the farm and we talked about stuff.
Maybe your parents are like what you describe but don't underestimate other peoples parents. They might not agree immediately, but if one is careful many actually aren't unreasonable.
Also everyone: stop this defeatist attitude. Instead of asking leading questions, talk about it calmly and politely.
Just explain that once this system is in place it will be used for anything, not just photos (or otherwise bad guys could just zip the files). And when everything is scanned some people will add terrorist material (i.e. history and chemistry books), other will add extremist material (religious writings), blasphemous material (Christian or Atheist teachings in Saudi Arabia), and other illegal content (Winnie the Pooh, man against tank etc in China).
In the paragraph above there should be something to make everyone from Ateheists through Christians, Muslims, nerds, art lovers and Winnie the Pooh fans see why this is a bad idea.