I don't watch whale wars mainly because I think the people are idiots who are endangering lives with their tactics.
However, they have had a real effect on whaling, shutting down this year's season early.
In the real world, Japan and Norway do commercial whaling, although Japan denies that it is doing it for commercial purposes.
In the real world, there is an international ban on commercial whaling.
In the real world, mercury is pervasive in the environment, mostly due to industrial contamination. It builds in the food chain, which is why fish is particularly problematic. Most large fish eat other fish, it is one of the few predatory animals that most American's eat on a regular basis.
In the real world, other countries have different cultural values, environmental standards and transparency of government.
There may be more important issues in the world than mercury poisoning or whaling, but most people focus on solving the problems that are important to them. The differences in what we value and think worthwhile are one of the things that makes people so interesting.
While I do think the "whale war" folks are idiots. I do admire their passion. It is people like them who change the world.