I dough a cheap laser would do the trick with the satallites in a 550km orbit. At that distance the beam would attenuate and be harmless to the satallites I would think.
In light of the Oneweb bankruptcy they need to make it mandatory that there is a de-orbit function (so they de-orbit and burn up) built in so we don't just send these things up and instantly as with Oneweb they are space junk.
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