You can't blame those who feed their kids shipping or fishing, nor kids with cut feet. Everyone has an agenda, be it noble or less than. We do however somewhat overstep our bounds pronouncing the mussels "invaders". Our own sense of fatality sympathizes with "struggling native species", as well as a nagging fear of the uncertain future remaining for our biosphere. As if deep inside they knew the gods were angry, and curiously refrained from comment... IMHO, We do have bigger fish to fry just now, and I take it as no surprise that business lobbies overrun any effort to practice ecological moderation much less meaningful (however misguided) management.