You can't use the (false) premise that "nobody ever complains about jets polluting our atmosphere" to justify hindering the detection of near-earth asteroids, which is guaranteed to eventually threaten the safety of people in this planet, possibly in a country that is not opting in to this situation. This is why legality cannot be the sole basis of right/wrong. Just because countries do not (yet!) have jurisdiction over space doesn't mean that you can just do anything with it--and especially if the said countries without jurisdiction may be the collateral damage of such actions.