Unicorns, those nearly universal symbols of childhood mythology and fairy-tales, have resurfaced in a startling way throughout the past couple of years. Although there have been references to good unicorns as late as Narnia, unicorns have begun to show up in, er, other formats. Let's go to the ever-reliable ThinkGeek website, for example.
This is, obviously, unicorn meat. At least, it's labeled as unicorn meat, anyway.
And this is an "avenging unicorn" toy. From the description on McPhee's website: "Everyone wants an imaginary unicorn friend that they can call forth to smite their enemies. The Avenging Unicorn Play Set has everything you need to use the power of the unicorn to rid your life of irritations." (ibid.) In other words, this is a unicorn that will impale you with its horn (which you can change, by the way, to be several different types!).
So, I ask you, what could have caused this inexplicable change in focus, where our friend the unicorn is concerned? Well, I don't know. It seems to work this way in fiction, though--I mean, nowadays we've got loads upon loads of antiheroes/fallen angels fighting for good/vegetarian vampires/whatnot, so it's really no surprise that some people decided to take the unicorn and turn it on its horn. People rewrite or reinvent mythologies for themselves all the time, and the unicorn just happens to be one of those.
Besides. What did you think that horn was for, anyway? (cue "Psycho" violins)