In post #68 Rottonray mentions "Civil Disobedience". Actually this is Criminal Disobedience. Let us make no mistake about this.
In the days of going for a £6.99 burger and expecting 5 star customer service, it's important to remember who is in charge when you step onto an aircraft. It's not Nando's or the post office, and if the Captain or any of the crew says "Sit down, stand up, turn around 3 times and sing us a song" then, however unreasonable it may seem, that's what happens. You can talk it through with Customer Services later.