Sorry to hear that you have such a silly friend, honestly, everyone knows that those test are happening frequently, why on earth play with fire?, I guess that he deserved what he's got.
Do they cheeck in other countries?, I'm not sure, but when he goes to find an toher job he better don't mention Emirates or else his future employes could do a cross check with EK and then he won't get another job.
Maybe I'm wrong, but I hope that this teach some others a lesson.