Can I trust Cisco VPNs? Can I trust Windows? Can I trust my router? The NSA opens boxes in shipment to break their security, and they have the resources to do a lot more.
Unfortunately for us in the U.S., the NSA threat is a real one, not a hypothetical.
And a question for the people who know more than me: is there any IT vendor who hasn't been corrupted by the NSA, the Russians or the Chinese?