Yeah, we had FFA a couple of times (by accident). It's not about the server. It's about the add-on. Because of all the kill streak spam it gets overloaded and then cheaters can basically play for several minutes before the add-on catches up and they get kicked. At least, that's what happened before, if I recall correctly.
@GammaDeltaII is there a way to disable all addons functions except ban and kick and autocheck names, so there wont be any message of type "bubu is on rampage" or " multi kill" ? So basically we make addon function disabled only during FFA maps. I know that maybe its difficult to implement but it would give us a plus fun for our servers.