Humanity is having trouble coordinating and enforcing even global restrictions in greenhouse gasses. Try ensuring that nobody does anything risky or short-sighted with a technology that has no clearly-cut threshold between a "safe" and "dangerous" level of capability, and which can be beneficial for performing in pretty much any competitive and financially lucrative domain.
Restricting the AI's capabilities may work for a short while, assuming that only a small group of pioneers manages to develop the initial AIs and they're responsible with their use of the technology - but as Bruce Schneier says, today's top-secret programs become tomorrow's PhD theses and the next day's common applications. If we want to survive in the long term, we need to figure out how to make the free-acting AIs safe, too - otherwise it's just a ticking time bomb before the first guys accidentally or intentionally release theirs.
I think you very much misunderstand my suggestion. I'm saying that there is no reason to presume AI will be given the keys to the kingdom from day one, not advocating for some sort of regulatory regime.
There have been a couple of brief discussions of this in the Open Thread, but it seems likely to generate more so here's a place for it.
The original paper in Nature about AlphaGo.
Google Asia Pacific blog, where results will be posted. DeepMind's YouTube channel, where the games are being live-streamed.
Discussion on Hacker News after AlphaGo's win of the first game.