I see the point you are trying to make, but the analogy misses some nuance. A question that captures more of the muddiness of this is "If I find out someone is committing a crime and I prove it by indiscriminately publishing their emails, is the embarrassment that is created when it is revealed they were having an affair my fault or their own?"

Even then, they choose to have the affair. While I do like privacy, I don't like blaming others for the consequences of exposing one's own misdeeds (even when they are not illegal).

Determining an acceptable level of collateral damage is a very, very tricky problem. In the Snowden case I think the damage that was done is acceptable in order to root out illegal activity, but that doesn't mean that collateral damage wasn't done, or that perhaps steps could have been taken to minimize that damage.

But ultimately, the calculus for what is acceptable when it comes to collateral damage is extraordinarily subjective. I don't know of any concrete way to judge it so I am usually forced into using my own value system as to what is important in my life.