[tlongo]

I think "blame" is the wrong term here.

No one can be blamed for unintended consequences (most of the time, I guess). However, the fact remains that one is a crucial part of the chain of events that led to the very existence of the consequence.

[tgv]

Knowingly. It's not as if no-one warned, and as if there aren't any precedents.

But you wouldn't blame the man who puts a poison pill near a playground, and claims "I didn't make them eat it"?