southoftheborder
No disrespect intended, but I believe you should be ready to anticipate problems from Airlines from certain parts of the world.
Everybody should know the 'rules', but the fact is that not everybody does. Much in the same way that if I questioned you about some of your 'rules' you would not know the answer to everything.
You have seen and observed some airlines not follwing the rules so I hope that the next day you would treat them with a little caution.
If you see an airline continuously breaking the 'rules' then a report to the authorities is an appropriate course of action.