[Rebelgecko]

Most people replies are focusing on carbon footprint, but it might also be worth considering noise (e.g. how does the sound of a rocket launching off the coast of California affect whales?) and any atmospheric perturbations caused by the rocket. Launches damage the ionosphere, which hasn't been an issue in the past because as far as we know the damage doesn't have a huge impact, and the ionosphere usually is back to normal within a few hours (or even less depending on trajectory and some other factors). If launches are happening every hour in the same area, that might cause some problems with things like radios.

[jerf]

Does it damage the ionosphere? According to what definition of "damage"?

I honestly don't know, so if someone can explain how it really is damage, please do so by all means. But despite some popular suppositions to the contrary, "affects" != "damage". I know it affects it, probably from the same article from a week or so back as you, but that doesn't mean it's "damaged".

[Rebelgecko]

I guess "damage" is a judgement call I'm not really qualified to make. Someone could probably make the argument that humanity can't "damage" a natural system because we're part of nature. When half the electrons disappear over a few thousand square kilometers, it's not inherently better or worse. It may annoy someone at Arecibo Observatory or a HAM radio operator or a GPS user, but maybe there's also some positive aspects of that temporary depletion.