What shocks me is that the Russians would reveal this. It is in their interest for the hoax to continue as it would burden the west with pointless taxes, make us weaker and reduce us to a third world power as Zero, the Muslims, and the Russians so desire.
Your points are valid but an over-riding concern is that countries will then move away from petro-products and Russia wants to sell petro-products - *lots* of petro-products.
So in the long run it is better for them to crush the AGW crowd if convenient and now is probably as convenient a time as will ever be.
We ought to help them.