Watcha gonna do?
Players using two accounts, two computers and two connections to gain an edge in a game (somebody needs a life really bad). I suppose HTC can somehow catch some of these, but what of when there is more than one player in a family, a person is using two credit cards, or friends are sharing accounts? It's impossible to prevent, but at least HTC makes money off them.
There are also players switching sides and communicating with their squaddies via private channel, VOX, instant message,phone or carrier pigeon. Would it be better to not allow switching countries? Ain't gonna happen.
So what are you going to do about it? I suspect nadda, and it is just a game after all, unless you want to be as annal about it as the spies. But you can reduce the problem by not advertising the mission origin or destination on country channel.