Some of the taxi drivers are carrying out a practice which is in danger of ruining the reputation of the otherwise lovely people of Santorini.
On getting into a cab, the driver will unexpectedly tell you he has to pick up another passenger or try to keep you waiting while attempting to fill the car with more equally confused passengers. On one occasion the driver,on picking us up late at night in a very isolated area, told us he was picking up another fare. When I said no, he threatened to throw us out of the cab. I asked for his licence number & threatened to call the police. He relented.
Tourists of Santorini, apparently this has become a Greek- wide problem but only if people say they wont put up with it will it stop.