Even in the EU that's not an illegal wiretap.
http://yro.slashdot.org/story/11/05/13/ ... e-Over-DPI...it has now been revealed that they have apparently employed deep packet inspection (DPI) to monitor customers' use of WhatsApp (and also VoIP services) — which happens to be illegal in the Netherlands.
I suppose it's possible but having worked around\on this sort of thing for a while actually doing it at that level is... hard. And expensive, and obvious.