For those saying it’s a difficult bc of error codes. It’s simple. Add a pop up when you hold to go to orbit that says “leaving this match will give you a strike in competitive crucible modes. Leaving too many matches will suspend your access to competitive crucible modes as well as reducing your rank and rank progress for a short period. Are you sure you want to proceed?” And they have to manually hit yes or no. Now if they alt f4, or turn off their pc or console, it would be able to detect that. If there’s no error code given to the servers, that player receives a strike. Now for players who’s power goes out, maybe don’t hop back in until you’re sure your power is stable