The tactic of using 5th columns to cause internal weakness to your enemy is almost as old as warfare itself and it's very powerful, cheap and effective.

It's an attack. 

I'm curious to find out what the US of A will do to the actually countries that are employing these attack vectors because blaming the telephone company for the calls made is short-sighted. What will they do about Russia and to a lessor extent the Chinese? What will we do here in Canada about these attacks? Umm, ahh, umm, ahh.