These are deeply foolish objections. Space is already chock full of ionizing radiation, and is so enormously sparse that waste ejected into interstellar space (for example) is not going to hit anything of value, even for many orders of magnitude of time beyond the half life of anything in there. This is clearly much preferable to putting the stuff a few kilometers away from an active biosphere.
Can't wait to see the reaction when one of these barrels inevitably hits something important to someone.