And those chlorine atoms from the ocean never reach the ozone in the stratosphere because they're highly reactive. CFCs are far more innert under normal atmospheric conditions closer to the surface. ...

I don't buy it, higher pressure makes chemicals more reactive, not less reactive. Also, I have a hard time buying that you are going to get more CFC's up there than you're going to get regular chlorine ions from the ocean, just because you are talking about several orders of magnitude more.

Not to mention, ozone not only blocks UV, but is generated by it as it passes through O2. As in, you are not going to get a depletion, only a lowering of the ozone layer, and maybe a widening of it if what you claimed was true. Which is why we have an ozone hole, by the way, because the light hits the polls at a steep angle and needs to go through much more atmosphere before reaching surface. The thing has been there millions of years. Notice how they are always talking about the ozone, but never about the actual UV that hits the surface, which frankly hasn't changed at all.