Yes, you have to be aware so that you're not caught by the odd person who might want to take advantage of you, but the necessity to protect yourself against these sorts of people is far over-emphasized.
Be Open. Most people who have had real traveling adventures will tell you that human beings all over the world are remarkably kind, generous and openhearted. Yes, you have to be aware so that you're not caught by the odd person who might want to take advantage of you, but the necessity to protect yourself against these sorts of people is far over-emphasized. Most people simply want to connect, share, and give--most of the time without expecting anything in return. If you can connect with the locals on a fundamental level, your exploration is sure to be as fulfilling as you desire.