CCP could borrow a page or two from Eve Online's anti-bot/anti-RMT tracking methods. CCP's security team has literally 10 years experience developing algorithms designed to specifically to track specific behavior that is indicative of a bot or illegal RMT operation. They can trace millions of player-to-player transaction down to the original source, expertly hunt down and discover deep connections between two "seemingly" unrelated accounts (even if they have different IP addresses) and ban them for botting for illegal RMT operations, etc. They can even tell if you're using botting software due to specific patterns.

Did I forget to mention that Eve Online players have spies embedded within the bot communities so that CCP can find out how to better track bot users?

In a first person shooter, it shouldn't be too hard to track a modded control user. Just develop an algorithm that looks for specific patterns that cannot be replicated by normal human motor skills and is indicative of maybe an AFKer. Constantly running in circles throughout a single match while AFKing (rubber band on the controller), Constantly running into a wall throughout the whole match (same rubber band), super-constant tapping of the trigger button via the turbo function, etc.

They could make it so the gun simply stops firing if a limit is reached.

Instead of creating a system setting forbidding rules, monitoring and enforcing those rules it makes more sense to create the weapons so that inhuman input doesn't benefit from it that much.

I remind that 'modded' controllers are simply autofire mechanic sometimes built in with controllers - something that has happened since the 80's.

Just look for constant repetition
And do the punishment with sp and isk fines

The only fix they can come up with for that is going to screw over everybody, not just turbo users.

Point 1:
There is a chance it might accidentally affect legit players


Point 2:
There are workarounds for identical keypress monitoring.
One way would be to set a macro in following way:

< shot >
< 1ms wait >
< shot >
< 2ms wait >
< shot >
< 1ms wait >
< shot >
< 3ms wait >
.
.
.


That macro could be set to last even minutes. Too repetitive? Heck, you could even set the millisecond wait amounts to be digits from pi...




Please note: I'm neither endorsing or judging macro or autofire use.

But I most definately I want to point out flaws in any savior plan before they are implemented - especially those which might include getting players themselves kicked or even banned!

You missed the point: it is not cheating. It is very basic functionality.
An analogy to car games: One player has DS3 for racing game. The other has steering wheel. It is likely for the wheel user to have at least some advantage.

Permanent fire / autofire controller from 1983

Then full auto weapons need a serious kick in recoil aswell otherwise you end up with the Tac from chromosone as a mantlepiece again.