Strange, that a person would ask for thanks after doing a good deed. Many people do good deeds and do not expect a thank you. People should do good deeds because its the right thing to do--not because they want to be praised or acknowledged.
Anyway, people need to realize that you can't go to any country and do whatever you want. It's a sense of entitlement by many young people of our generation and this entitlement extends to when they leave the country.