I am heavily invested in speedrunning culture, but myself am mostly involved in the Halo community. I have a couple of world records of my own, and I also do routing and other technical things for the community.
Halo has its own long history of cheaters, many of whom were also pivotal founders of the community. In the wider speedrunning scene there are many examples of similar situations. I do not think that speedrunning necessarily has a higher percentage of cheaters, if you compare against other competitive sports and activities the rates would likely be comparable. But that number is far from zero.
I am working on developing TAS (Tool-Assisted Speedrun) tools for the Halo games. With the tools you can create frame-perfect recreations of gameplay that are indistinguishable from actual play.
I am honestly at a stand-still on whether I should ever publicly release a working version of the tools. The main worry is that the tools will be used to submit "fake" runs passed off as human gameplay. I have built in basic safeguards to deter the most basic cheaters, little things that you would never see as a casual player but if you know what to look for would stand out in a video. But there is always the chance a sophisticated user could reverse those changes and fly under the radar.
On the one hand it could open a floodgate of awesome content, tricks, and discoveries. On the other it could potentially completely ruin the integrity of the leaderboards. I am quite conflicted on how to continue with this project if anyone has any insight that might be helpful.