First thought (I've not read the whole thread, so apologies to anyone who has already made this point): no-one should vote FOR it until they've tried it.

Second: It's done everywhere, but when it's discovered, it should be punished harshly. We are SUPPOSED to be the "good guys" as someone said. Then let us make sure that anyone letting down the standards we aspire to is made to pay.

Third: It makes no difference that "the enemy" would do it to us. It's still wrong.

Fourth: "It's justifable because it's the only way to get information that might save lives." No it isn't! The ends do not justify the means, especially when it is not always certain what the "ends" might turn out to be.

I could go on ...

But no-one can justify it except to say that it's better than doing something worse. Well, of course!