I understand where you're coming from but I disagree. As long as I am not paying to unlock content that is already on the disk and the developer is adding to the experience, I have no problem paying a few bucks to extend the life of a game I enjoy.
Developers and publishers are having a tough time managing the increasing cost of producing a game. They need to find a way to generate extra revenue and DLC is part of the solution. I would much rather have the choice to pay for extra content then see game prices rise to $69.99 as the base price.
I also don't like the fact that PC gamers get the same content for free (I strictly play on consoles). But I think that will be changing soon. Between subscription based services and distribution through Steam, I think PC gamers will begin to pay for the updates one way or the other.
