Heavy metal toxicity in seafood from larger fish is a worry, even if the ocean was bursting with fish of all species all of a sudden. I haven't found farmed fish as yet up to my standards, just look at the colour of farmed salmon, and it doesn't make me feel too good after consuming. The best fish I have access to presently are sardines in glass from Spain.

World government worries me as it would threaten Israel (let alone everything else it deems bad) because it would become a scapegoat and distraction from its own evils. So I just ban certain fish in my own mind.