Unfortunately, physical rape already does that, too, which is why it can't be minimized, and why it's so horrific in the first place. Mental rape, I imagine, operates on a parallel level, but it still hits all the benchmarks.
But in any case, fictional mental rape doesn't and shouldn't trivialize the impact of physical rape in the first place; it's still an analogue, like what Trek does with other topics. If anything, it should amplify and contextualize just how horrific real-world rape and violation truly is. Simply talking and exploring the effects of rape doesn't minimize rape itself. And like many things, how it's handled and treated by the characters is itself important, too. And this is where I feel Nemesis stumbles so badly, a sign of lost humanity for the sake of trying to be grim n' gritty. The mental rape itself doesn't trivialize physical rape, it's how it was treated and used in the story as mere shock value that trivialized physical rape.
Oh man, please don't believe that I underestimate or trivialize actual physical rape, I just meant that I can imagine mental rape going even beyond that another step farther/deeper.
I agree that Nemesis and all of Troi's mental violations never handle it very well. Troi never suffers any trauma from them, she just snaps back into being same old Deanna,
moments after she was violated.
As I said in an earlier post, the only time they actually explored the repercussions actual rape would have on someone was with Picard in Family and First Contact.
My enjoyment of the other Troi scene where she is finally FINALLY allowed to use her powers to kick ass, has nothing to do with the horribly handled rape scene and I would have preferred to just have her kick ass, without being violated beforehand.