People on my server get this. Its a suspicious delay between client and server data. Which is in essence what the Maphacks do, parse data whilst trying to update AFAIK. This can cause the game to kick you. #2 'hack' is years old. Proper ARMA stuff. Guys who run PFSENSE or forget about VPN connections through work get this. Usually results in a few laughs on TS. B.E will know if they're hacking and so will you as if they are it will KEEP kicking them sooner and sooner after they log in. And once its confirmed data is being parsed (usually by scanning memory) the key will get banned. All you can do is let BE do its thing, if they are cheating, they'll get caught. And banned.