How about when you try to purchase rage a text box pops up saying something along the lines of "Warning: purchasing this skill will make it easier to die. Are you sure you would like to learn rage?"
That way, people won't accidentally buy it when they don't want to pvp. I haven't bought it yet, so I assume there's no such message box.... correct me if I'm wrong.
A warning before using tokens would be nice as well, since it's easy to misclick when trying to put them in your hearth fire.