It will never be easy. This kind of tech will rely on the subjects thinking of that memory. And you can always, well, choose not to. Or even corrupt the memory deliberately by imagining things.
You don't choose anything. I'm finding it hard that anyone can think otherwise with research such as the article indicating function before awareness.
Isn't it very hard to "not think about it" when required to not think about it ?
It's a skill that you can practice through meditation. But false-memories and fabricated memories will shoot this idea down long before that stuff comes into play. Memory is no where near reliable enough to be used as evidence like that.
Witness statements are used right now, and they're memory filtered through people's perceptions and desires; potentially way worse.
Correct - and they're now gradually having less and less reliability assigned to them, which is good.