Just Devil's Advocate, but I think it's fairly well established that human memories are not "kinda inaccurate", they are woefully inaccurate. Most of the time a human can get some of the big stuff right, but the neuro-psychological underpinnings of "attention" and "memory" pretty much guarantee we will miss a lot of what's going on. (And if we can put the human under enough stress, s/he will not even get the big stuff right.) The fact is, humans rarely even "see" what's actually in front of them, let alone have any "memory" of what was actually in front of them. (For us, reality is not reality, rather our perception is our reality.)

Now the memory being inaccurate to start with does not make manipulating that already inaccurate memory "ok". There's no question about that. Though having said that, it's important to note that because memories are so malleable and inaccurate, we've actually been manipulating them for a long time. It's actually a pretty well researched area.

I mean, this is not really new.