"Waldo - Some species of whales are under the threat of extinction, not all."
Quite right. So, to qualify:
The most hunted whale is the Minke. That's currently classified as "near-threatened".
Sei whale are "endangered".
Bryde's Whales are "under conservation measures".
Humpbacks and Sperm whales are "vulnerable".
Fin whales are "Endangered".
These classifications are from
http://app.iucn.org/webfiles/doc/SSC/RedList/r edlistcatsenglish.pdf by the way. I couldn't find cows on their list ;-)
So you're right. Only some are threatened with extinction at present levels. The others are merely 'vulnerable' or 'under conservation measures' or 'near threatened' (the only one which doesn't count as a threatened status).
It's just that one has to wonder what would happen to those statuses if hunting were allowed to resume..?