Re: Just another attempt
Isn't that the same for secured APs as well though? Once people are connected then there's not much difference unless the router has some firewall policies blocking inter device connections (which isn't what we're talking about here I don't think?).
Plus if it's a public WiFi then the Password isn't going to be hard to get hold of (on a notice by the cash register etc...) so not really much of a security gain...
As someone said above though I'm more than willing to be proved wrong.