Criterion number one would have to be my personal opinion that World of Warcraft is an addictive scourge on society. I know someone who stuck his "box set" in the trash. When asked why not try to resell it on Ebay, he said would never want to inflict so much pain on anyone, not even his enemies, and would rather just throw it away. Iran getting banned from the Blizzard servers is a blessing in disguise, kind of like a boatload of heroin and dirty AIDS-riddled needles "unfortunately" sinking to the bottom of the ocean and failing to reach its destination.
So, why should I help Blizzard in making more money?
There's a difference between your personal opinion and morality. "Murder is immoral" does not mean, "I don't want to murder" but instead means, "
nobody should murder (and those that try can be stopped)".
Saying that it would be immoral to help people Iran use WoW implies more than just that you don't want to do it, but that you feel justified in stopping people from doing it.