@darth yeah. If there's no huge incentive to crack it people won't crack it.
Also, why don't game developers crack down massively on recreational XIM users? Because they know a huge number of people are using these devices and the game's popularity partly depends on gamers being able to use K&M if they want.
Sure, ban it for championships but stopping little Billy in his bedroom from using a XIM will have a detrimental effect on the game's popularity.
Solution? Support K&M, support gyro, support flick stick, support wheels, etc... If everything is supported by default there's much less incentive for someone to buy a XIM.