what causes a bypass shock to "twist"?

I've read the threads about ADS rear bypasses occasionally twisting or coming loose and causing some clearance issues on the passenger side. What exactly causes this issue? Is it only the top nut coming loose, then the shock rotates slightly throughout the suspension travel or is it something else as well? Do King bypasses have the same issue? Do other rear shocks with remote reservoirs come loose too, but don't cause an issue because there is more space for clearance with suspension and brake components?

 

informal poll...please chime in if you have either ADS or King bypasses and let me know if you've had them come loose or not...thanks!