Late update: if you look at the fancy full version of the IPCC graphs[0], there's a funny (ehh...) observation: the human destruction of stratospheric ozone was one of the largest climate radiative forcing factors—and it was on the "cooling" side!

[0] https://www.ipcc.ch/report/ar5/wg1/technical-summary/figts-0...

It's the negative-side, green (O₃) bar in the third row, "halocarbons". There's multiple human contributions to ozone I don't fully understand, but, *that* one's the stratospheric ozone destruction due to CFC's. (That's not to to say CFC's were good for the climate: as that same row illustrates, CFC's themselves are also ultrapotent greenhouse gases. If you trust the fancy graph, the CFC's direct heating effect slightly outweighed their cooling effect via destroying ozone).