The problem is that preventing it is difficult to impossible.
You can't calculate recoil server-side because the latency would make it nigh unplayable. But once it's done client-side, it's cheatable.
Logitech is the problem here for even allowing this in the first place. No CRC checks for mouse firmware or anything? It screams poor implementation. I will not be surprised if anti-cheat software starts banning people or companies like Logitech.
Kind of sad to see the number of threads and communities online encouraging this. The point of games is to have fun, when you cheat all that goes out the door.
It's client-side. Spoofing the CRC checks would be almost trivial.
They don't have to.
All they need is a signature of a valid firmware, and then inject code that returns that signature.
The "kids" won't be the ones writing the cheats. That'll be someone who knows how to write code that injects code into another running process, and then they sell the cheat software.
Blizzard tried for YEARS to detect a bot program for World of Warcraft called Glider. Every time they found a way to detect it, the bot engineers found a way to evade the detection. It was constant cat and mouse until Blizz sued the developer and had them shut down.
More back on topic, most of the cheaters are just script kiddies. There are only a couple that actually develop cheats, and they tend to be quite clever.
