Shouldn't some words always have the power they are given?

Take the word rape for instance. I think we can all agree that rape is one of the worst things a person can endure, not something that should be belittled or taken lightly. Now I spend a lot of time playing games, and in particular online games such as World of Warcraft. In this game sadly it's not uncommon to hear people say "that was easy we really raped that xxxxxxx". When I hear that in game it upsets me. A few times I've taken the time to explain to the person why that's not appropriate, and I'd like to think I've made my point.

Words should have power, otherwise our language would become pretty bland.