A pity-evoking scam: a beggar approaches you and shows you a gaping wound filled with pus. He tells you that he needs tetanus shots, but can't afford them. You buy him the shots and offer to take him to a doctor, too. By then, he disappears. Then, he goes back to the pharmacy and gets a refund.
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Bait and switch: You are met by hotel reps at the ( bus/train/boat/ air-)station. They tell you that the rates are so much and show you brochures. Then, they take you to the hotel and ask you to pay the fare. You pay and they go. Now, the front desk tell you that there's no such rate and