Ok, let's agree that the proposition we are discussing is this:
* Freedom is the limitation of choice.
My counter-argument is this:
Limitations on choice through potential consequences are ultimately self-imposed. To have any effect, they require me to refuse to consider the possibility of the alternative. To the extent they limit my action, it is through my choice, possibly implicit, to let them limit my actions. The option of making the choice never goes away no matter how grievous the potential consequence.
Since this is in a discussion around a post by Snowden, we can take him as an example. He did something that, according to this theory of freedom, is impossible. He wasn't free to do it, his choice was limited by potential punishment. Yet he did, the possibility of making the supposedly impossible choice was still there.
Consider a hypothetical man who has lived isolated indoors all life playing video games, never gone to school, never watched TV, nobody told him about any consequences. One day at the age of 25 he finally discovers a door to the outside and goes through and thinks "oh man, this is like GTA!" and goes around punching the elderly, stealing things, breaking all manner of laws as he has been taught is how you get points. Eventually the strange man is caught and sent to prison, but until that point, was he more free than we are? He was subject to the same laws and social consequences as we are, but they weren't able to limit his choices because of his ignorance. Clearly it can't be the laws themselves that limit choices if this is the case.
It appears to me there is something strange about the given definition of freedom. It lends itself to producing paradoxes, where people who aren't free are capable of being simultaneously free, and the same sources of limitation successfully limit some people but not others based on what attitude they have toward them. This type of contradiction usually means a definition is incomplete.