Now that is the type of argument I like.Yes. Things may get very bumpy for a whole slew of reason (over-population); war based on greed or climate change; destruction of habitats, disease, etc...
We have built huge cities in flood plains (New Orleans) and entire nations (Bangladesh). There will be huge problems as see levels rise. Some places will endure problems (Florida) and some island nations will cease to be. Wars and other problems may arrive from this.
I am not saying to be an ostrich and bury ones head in the sand or to go around and *just be happy* (or if you like a more literary reference - that we should all take a Panglossian perspective on what-will-be).
But being a chicken-little (I'm not referring to you) saying that the sky is falling; and that rising C02 levels are an existential threat to life on earth - now that just rubs me the wrong way. It's like hearing a snake-oil salesman or phoney-assed preacher scaring the rubes.