That's exactly the response that I'd be going for as a pro-oil propagandist: Nothing you can do matters! The government (the only entity that can rein in these corps though regulation) won't listen to you so don't even bother to vote!
People who pay attention to their carbon footprint are much, much more likely to vote for candidates that support climate change infinitives. Many don't see it as blaming themselves, but as a roadmap on how to do things better. Again, everyone starts somewhere. For many people, that starting point is their own impact, how ever so small.
Nah. You were right. There's nothing we can do about it so why bother trying? Guess I'll start rolling coal, trowing my trash directly into the river, and not voting at all as my impact means nothing. I'd also say let's celebrate but it's not worth it to start small get together outside that our neighbors might join us for the festivities so we might as well just cough ourselves to sleep.