Sanctions

So, the UN Security Council has unanimously imposed sanctions on North Korea for its development of nuclear weapons. I have three comments on this:

1. Since the main members of the Security Council are all themselves nuclear powers, isn't this hypocritical? I mean, I CERTAINLY don't want North Korea to have nukes, but when nations that have nukes tell others they can't have them, isn't that hypocritical?

2. It says a lot that China joined in. Usual protective of their neighbor that makes even the craziest Chinese regime seem sane, China must really be pissed at N. Korea.

3. Are these sanctions even meaningful? I mean, N. Korea has almost no contact with the outside world. Do these sanctions actually change anything, or is it merely imposing from the outside what N. Korea has already imposed on itself?

Finally, this reminds me that on Current TV there was a very good segment where Current TV reporters go to North Korea and report on it. VERY bizarre country! It really shows how even when on their best behavior, N. Korea seems insane. The best part of the segment was the way the reporters, forced to bow and speak nice things about the "Great Leader" Kim Il Sung did so with great sarcasm, which was lost on their hosts.