Yup. You gotta get up in their face. Aimbotters are generally very poor players, that's why they aimbot. So if you manage to sneak up on them while they're sitting back and sniping in their reaper or whatever, you can generally mince them at close range.
And if you can't easily sneak up on them, hop from cover to cover until you can get close enough. The closer, the better. I've trashed and dominated plenty of aimbotters by striking hard and fast with a zerker or infil.
Doesn't always work, but it sure is satisfying when it does.
As for reporting them, apparently you need to catch them on video and submit that to Reloaded now. Just naming the time, server and username of the hacker isn't enough (it used to be, but Reloaded is clearly still figuring out which way is up).
Edited by Nightfirebolt, 03 August 2015 - 04:20 PM.