Ah, tourist scams abound everywhere. We got done in Bangkok by the tuktuk drivers. But, you (should) wise up pretty quick after the first one.
After that, we found it hard to get a tuktuk that would just take us directly where we wanted to go. Then when we finally did, I made the fatal mistake of not having smaller bank notes. He of course did not have change. So we were done again.
It turned out the taxis were in the end, the best way for a foreigner to get around as they are strictly policed.