I use Falcon Kit to test players, if they got killaura by attacking at an angle commonly used by cheat detectors and actually do damage to them to see if they instantly snap their heads to me.
Some people have snapped their head to me already in the past, but their head snap were not fast enough for me to be considered a cheat, but still pretty fast and sharp to where I’m attacking from. 
I also got someone banned, who used fastfly as falcon and used it to get an advantage in pvp, but I didn’t get someone else banned, because he was using fastfly for entertainment, but he was sneak-flying up and down, which made it hard to see their name.
In my quest to test a player’s innocence, elementalists and slingshots were always in my way and always targeted me, when I tried to record a potential hacker, as if they knew that someone is gonna get banned they are friends with, if they let me go.