Respect should be shown to all people you come into contact with. Remember that their customs and etiquette may be different from your own. If you deal respectfully with the locals your own lack of understanding of their culture will more easily overlooked.
Travelling through developing countries can be unpredictable and frustrating at times, but losing your temper will not help. Whatever the situation, try to stay calm, firm and courteous and speak without raising your voice. Personal dignity is extremely important here. Becoming angry is considered a major weakness and local people will be embarrassed for you. If you do get into a stressful situation it is always better to ask for help than to finger blame.
“Saving face” is a subtle but important aspect of personal dignity and smiles open doors. Criticism is not as easily accepted as it is in western countries and should only be made when also giving praise.