[sinnet3000]

The Wi-fi Alliance has created an standard called Hotspot 2.0, which aims to fix "Wifi UX" in these scenarios. From Wikipedia: "The idea is for mobile devices to automatically join a Wi-Fi subscriber service whenever the user enters a Hotspot 2.0 area, in order to provide better bandwidth and services-on-demand to end-users, while also alleviating mobile carrier infrastructure of traffic overheads."

[nitrogen]

How does this standard deal with issues like user privacy, rogue hotspots, etc.?

[gergles]

PassPoint uses 802.1x and client certificates/PKI to authenticate. I have the Boingo Wi-Fi service client cert installed on my iPhone and it automatically connects to any -Passpoint network via a WPA2 connection and authenticates with the installed cert. It's really nice for traveling.