Interesting point but if you have a disclaimer that they have to click to enter the website that says that they agree that this is a private flight operating under private rules with me your friend and therefore is not regulated under public transport...blah....blah is that ok? Would this be the same as accepting the T&C of any website?
I'm just trying to play with ideas here because there's got to be some way of doing it. If we were down the pub we would say, `come with me, it's great`, so why can't you put it on a non-public website that only your friends have access to?
Thanks for your thoughts guys.