Yes but there's so many starlinks that you're going to get lots and lots of collateral damage to sats from allies and enemies alike. It's going to be a huge footgun.

Not much else uses those orbits right now. Other comms satellites and surveillance birds are all higher up. The debris would in theory also clear pretty quickly and should be fairly contained so the cascade of additional damage might be relatively small too. Hard to know that without a huge simulation budget to see how high the shattered satellite bits might get tossed.