A surprising number of people on here making excuses. There are existing laws that can be used as have already been mentioned. Cabin crew saying that they cannot tell people what to do should realise that if there are more instances of this, the trust of the travelling public will be lost, people will not fly and more of us will lose our jobs. Wake up, smell the coffee, grow a spine and tell the SLF to sit down, shut up, belt up, put their tray away, not smoke in the toilet and all the other lawful instructions otherwise they will find themselves in court. The alternative is not acceptable