There's no universal experience in gaming with cheaters online, but they do obviously exist.
I can't understand the allure to cheat, as then one's gaming experience just becomes a parody of itself. Maybe there's less cheating in historically derived games like RO, because those that are drawn to them are wanting to experience that "suspension of disbelief". In this regards, I've personally never been drawn to fantasy/futuristc/sci-fi games for the very reason that I find it difficult to suspend my disbelief over something I already know is fantasy based. Not to highjack this thread, but I'm sure everyone is aware that the great trend in FPS games these days is to portray covert, or special force operations, either contemporary or "future" iterations. As I see it, the reason this has become so appealing to game developers, is that there's little need to substantiate the gameplay experienced in them against any fact-based measurables such as weapon performance, theaters of operations, politics, or the plauasability of their basic plot lines when they're about "covert", "classified", "special ops", or "futuristic" *combat*.......by design these games are beyond comparison (literally).
Again, perhaps this might be why there's less drive to cheat/hack historically-based games (as compared to the fantasy/futuristic/sci-fi genres), because in doing so the player's basis for any suspension of disbelief is jeopardized, which is something that other games have already dispensed with by the core basics of their designs.
(or maybe cheaters/hackers arejust attracted to the most popular genres......which for me is ok too)