If you're setting out to change the chemistry of our oceans, I'd say it's worth looking at all the angles.
Yes, very well put. After reading this article the first thing that came to mind was this: what will the effect be on ocean life when we increase the oceans alkalinity. The Law of Unintended Consequences becomes more of a concern when we take man made problems in one area of our world and try to shift them to another. It doesn't solve the real problem, it just spreads it around so it looks like we are accomplishing something. It then gives us a little more time to continue to "poop in our sandbox" before we have to come up with a real solution.
ASHes to ASHes, DOS to DOS.