Inb4 a whole bunch of people claiming they've never seen a single hacker in BF3 and everyone's exaggerating.
I never expected a moderator to turn out to be a hacker
and I fear things will only get worse as BF3 quickly rises to become more and more populated as time goes by.
I've had to remove a good 15 servers from my favs because they didn't have active admins and every 1-2 hours you would have a hacker ruining the entire round. Very few servers left with active admins now, but as long as I stick those servers the hackers are fairly rare and/or quickly dealt with
I'm sure the hackers themselves are keeping track of which servers have proper moderation and repeatedly attack the servers which lack it.