EA DICE is well aware of player complaints about cheaters in the Battlefield 3 Open Beta, whose presence has done nothing but hurt the online experience.
It should be known that the Battlefield 3 Open Beta runs without any anti-cheating countermeasures whatsoever, with Punkbuster disabled in its entirety. DICE explained that the reason for this is to monitor what players do in the beta, which includes behaving like a bunch of immature jackasses. As cheaters try to damage the game's server infrastructure in beta, DICE will have a good idea of how to prepare themselves upon the release of the game. In other words, it's a "What will assholes do?" preventative fact finding mission.
Posting on the Battlefield forums, community manager Ian "crash7801" Tornay created an official thread for players to lodge their complaints against the cheaters in the meantime.
Those suspected of foul play should be reported in the thread with their usernames and links to their Battlelog profiles. DICE will look into it, and—as crash7801 notes—"The hammer will fall swiftly and accurately."
