Many of these countries have extremely harsh punishments for drug offenses, AND have corrupt law enforcement where bribery is normal, but I challenge you to provide a single example of where a Westerner refused to bribe police and were subsequently shot in the head and dumped in a ditch. That makes little sense on multiple levels.

Edit: Ironically, searching for examples of such an incident only brings up examples of Indians and Vietnamese folks getting shot by police in America.