There are many people out here, and they don't listen what an expat person want to convey... All I heard "kalash, kalash".

There are very less chance to explain your concerns. So, its better to carry they proofs at all the time.

Why don't they focus against corruption. Its a well known one. E.g., I heard that there are few driving schools and they won't let you get the license unless you pay something. Even during your course you should pay few bugs to trainer. Why don't the traffic deparment do a regular check up on this.