Tourists from cruise ships destroy nice vacactions. Many hundreds of people come on the streets in groups, go throught the streets loudly and fast to take photos, than go back to the ship. People who really go to these places and spend money for staying and try to blend in to have a peaceful vacation can't.
It is impossible to "blend" somewhere in vacation. You have to live many years somewhere to blend. You are exactly like the cruise ship tourists if you stay for a few weeks.