So I don't know if you guys have heard but there have already been many sightings of hacked lobbies. Whether they stay around after Official game release or not has yet to be seen. Also whether dedicated Servers fix these issues is also questionable. MinnesotaBurns uploaded a video of him talking to said hackers.
As much as I like COD, hackers like this will always be present to ruin the game.
Video:
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