Ah, the fascinating evolution of language in action! Remember, a troll such as gore3000 is not a creature who lives under a bridge.
Okay; then what exactly is that thing under the North end of the Aurora bridge?
If that's NOT a troll eating a fahrvfignewton, I've never seen one!
Oh, that's a troll all right. But it's a different kind of troll from the troller what trolls for fish. (Convergent evolution, so to speak.) But now you're using one definition of "troll" when the other one should apply. If this incorrect definition of "Internet troll" sticks and takes over the meme pool, will it be an example of meme transfer, meme duplication, or a memetically modified organism (an MMO, or "frankenphrase") taking over the native stock? Hmmm...