Ohh what a clever idea, think so far this one takes the prize, following that logic instead of just turning the pipelines off, Russia should just start blowing all of them up, you know that'll really get the gas prices going up. You should've been more careful disclosing such ingenious ideas, now Qatar/Saudi Arabia/Iran/Venezuela might find out just how lucrative it can be to blow up their own most valuable pipelines! 
Uhm... make sure you're sitting down for this one: Russia had already turned the pipeline off. They've done it multiple times for ridiculous made up reasons. They've exhausted the blackmail potential on that one. Closing it off for a few weeks apparently just makes Germany work even harder on arranging alternative supplies, instead of wanting to cave (stop Ukraine weapon supplies, open NS2 etc), who could have possibly guessed.
Blowing it up though creates a few new potential scenarios, like threats to other pipelines etc. Again, this is Russian propaganda staple, what with apocalyptic "Europe freezing" scenarios etc. I'm not sure why you're now doing 180 from the gas blackmail and claim Russia couldn't have possibly done it. I guess trying to drive a wedge between the US and Europe is the new propaganda pivot. Good luck with that. Nothing unites more than a common enemy, especially a deranged lunatic like Putin.