For the uninitiated: XIM is a tool used to play console shooters with a mouse and keyboard and fake them as controllers, essentially giving them an unfair advantage in competitive shooters on console.
Ubisoft implemented a super effective way to counter XIM called “Mousetrap” a while ago. It slowly adds more and more input delay if you’re playing with a XIM and tons of people have been sharing clips of players clearly trying to use it and having a 200ms+ delay in their actions and playing like they’re drunk. It’s quite funny.
Yes, it’s still unfair. Ranked on consoles has crossplay disabled since aiming with a mouse is much more accurate than a stick, I wouldn’t really compare it to fightsticks since they’re not that different from controllers. In terms of accessibility, they specifically targeted mouse emulators. Other accessibility controllers still work.