The story coming to light about the stolen passports on MH370 isn't surprising.
When we passed through WMKK in January, my wife was able to get through immigration on my sons passport - it appears that not too many visual checks were made.
The error was noticed when my son attempted to go through immigration a few minutes later, which caused some angst in the family but didn't appear to spook the officials who simply looked at my wife (now airside), and processed her passport accordingly.
-edit... Just to put it into perspective though, we travel through 4 or 5 times per year... first time there was any issue...