Obviously this is true, and hotels providing wifi services want to charge for them rather than allowing users to use their own (much cheaper) systems. No question.

That aside, what is the solution to rogue access points in a public space? We all know that it's pretty easy to set up camp in a public space, broadcasting a friendly-looking but dangerous wifi network. Let's says you've got someone sitting in the Marriott lobby, creating the "Marriott Free Wifi" network. A bunch of people will connect to it, and some information will leak.

Is there any reasonable way to deal with this issue? Obviously we have to assume that public wifi is compromised in any case and require transport-layer security, but I can certainly see there's still a gaping security hole there.