I am now positively convinced that people DO NOT want to realize, that I DO NOT MEAN RAPE. It doesn't matter what I insert into the original idea, they only see this one thing, no matter what...
...and I am supposed to be the sick one here ò_ó
I just want to clarify - while I think the reaction you've gotten is unfair, getting defensive and wounded just makes you sound immature. The way you originally phrased your suggestion, for all the reasons Ilmoran noted, sounded a lot like someone who was attempted to implement a typical, though morally questionable, male fantasy into DF. I'm not saying that that's necessarily where you're coming from, but it did kind of come off that way. That's not good. But as I said, we talk about horrible things in-game all the time (after all, we already have macabre moods), and I think this idea has some merit in terms of game mechanic, especially something more along the lines of UmmonTL's suggestion. I found the way some people were reacting excessive, because if it were anything to do with violence I doubt people would react that way. The way we're conditioned to think differently about sex and violence is troubling. And in any case, I think it's worthwhile to cultivate the ability to consider any idea dispassionately; visceral disgust, while perhaps morally justified, makes it very hard to think rationally. Is it really rape if the gods decree it, and make it so both parties want it? Is something like this worse than a possessed mood that leads to insanity and death? Interesting questions, better addressed by discussion than dismissed with a "you need help".
Personally, I think the notion of having a dwarf destined by the gods for a certain task is exciting, plus I like the idea of getting a legendary dwarf in otherwise un-moodable skills. I think I might implement it using something like the "rust" feature in 2010, though; you'd get a child with no apparent special skills, but as soon as they start doing their destined craft they level up extremely quickly. You'd have to shop them around on different jobs to see what they're good at. Instead of simply being legendary whatevers, maybe they would have some higher probability of strange mooding. There's a lot of possibilities.
That said, I do have some problems with it from a game perspective; I'm wary of it for the same reason I'm wary of implementing magic in the game. I feel like it's a step towards changing the nature of the universe DF inhabits. I've always been more of a fan of the LOTR-style fantasy world than the D&D-style fantasy world, in that it's not
that different from the one we live in: different creatures, some very powerful artifacts, and very rare magic users, but otherwise similar. I've never really liked the Possessed strange mood for that reason (setting aside the whole "all that rigmarole for a cedar earring and I didn't even get a legendary craftsdwarf out of it!?" reaction). This brings up all the same issues.
Anyway, sorry for the length. Just think this is an interesting topic.