Stuff like that does happen. What's the point of it being taboo? Literature is meant to be honest - in its own fictional way.
I'm sorry you gave up ideas because of that. Sensitive topics only become cheap and bad-taste when they're used for shock value only. But they're important as anything else, can be explored as themes and have their place in a story. It's the controversial-for-the-sake-of-it books I avoid (Dan Brown, anyone?). But books often need to reveal the ugliest of things. Literature isn't just escapism and as the others have said, there are no taboos.
You know, I recently had a dream, or better said a dream in a dream: first a story was being played in my head, like a movie, and it was the most unpleasant thing, and then the dream went back to my normal self and I knew I had to write the story. I was telling myself in the dream, "I don't wanna write this, it's uncomfortable, it's not a nice subject, but I've got to, that's the idea that came to me, and it was so vivid, I've got to write it down". Needless to say I woke up with a grim determination that I had to write the bloody thing NOW... That's not entirely tied to your topic, sorry, it's just so strange to see this thread days after this dream.