If you include something like that, I think you'd have to include force-feed learning in schools, too. Things like Perfect Memory, and Lightning Deduction feats come to mind. And that completely throws off the skills aquirement. If you can remember anything, or figure out anything, what's the use of skill points?
But as far as altering or erasing someone's memory, that can be done by simple hypnosis, which I would think would have been analyzed completely in the ultra-high tech world 3500 years from now. "Here, Mr. Johnson, just put on this headset, and everything will be just fine." Induced memory amendment can be accomplished by a couple of things: fear, pain, or love/lust/pleasure. How do you learn to not put your hand on a hot stove? By getting burnt. Ultra-high tech sensory stimulation could accomplish this very easily, I think.
Scout
P.S. I'm not really sadistic, I just analyze EVERYTHING...