Poipet is not safe, particularly at night. Poipet is also full of people trying to scam you in anyway possible. If you are not here in transit or a visa run, you have no reason to be here. Stand your ground if you think you are being scammed. Watch out for pickpockets and snatch thieves, including the adorable little children who swarm you and cheer at the border. If you've managed to arrange a taxi away from the monopoly, don't pay up front, and do not let anybody you don't know into the car. The small upside to the travel monopoly is that, once the exorbitant price for the taxi has been paid, they're reliable, and the driver will take you anywhere you like once you've reached your destination.