In its list of top ten smartphone risks, the European Union Agency for Network and Information Security ranks network spoofing attacks as number 6. In this paper, we present how we have validated different computational trust and reputation management techniques by means of implemented prototypes in real devices to mitigate malicious legacy Wi-Fi hotspots including spoofing attacks. Then we explain how some of these techniques could be more easily deployed on a large scale thanks to simply using the available extensions of Hotspot 2.0, which could potentially lead to a new standard to improve Wi-Fi networks trustworthiness.