DayZ has promoted the Arma2 heavily and assuming a part of the players already had the game before,
i am sure a fair portion of the 950.000 x $20 people paid for a licence would be invested well in improved security.
i guess it is due to rising popularity of DayZ Mod that hacking or using scripts has increased.
General answer in the Dayz Forum is, Battleye Guys are responsible for security.
I am aware this is 'only' the Bohemia forum but i would like to raise some awareness.
I still would like to point out the fact that that issue has increased dramatically and i feel the community of players throughout all arma games would silently appreaciate if we had more guides on how to administrate Servers properly.
So if there already is any nice topic on this, i did not find by searching, also would ask this community to help, gather a proper guide for administrating servers or point me in the right direction