The problem with any AV program allowed to be a watchdog over Aces High, or any online game for that matter, is the fact they can destroy legitimate game data because the data pattern might match a virus. As more and more viruses are added to the databases, the chances of a game data packet being mangled increases.
Yes, most AV programs will allow you to configure them to not snoop on game data or application packets, but for most, it is a manual configuration item. Simply means that 99% of the users will never configure it. I say that based on how many people a day I deal with who will not configure the game to run better on their computer but will complain about how bad the game runs on their computer.
In many applications, the language used references things the end user may not understand. We (HTC) are probably thought to be that way as well. Then again, there are many people who have no idea how to copy a file on their computer and find all the terminology involved to much to deal with.
Then there are applications like Norton which can get in a state where it will completely ignore any configuration options. I cannot count how many times I have had a user have to remove Norton from their computer in order for them to get online in Aces High. It would not disable, it would not stop monitoring the game. No amount of flipping options did anything. Norton plus Vista seems to have brought these *features* to new highs.
Then there are all the false triggers game data can bring to the party. I cannot count how many accounts we have lost because of this. "Your game is trying to give my computer a virus!!" Hard to blame the end user for this. They think their AV program is doing its job.
From my side of the fence, AV programs are a nightmare.