Let's ban everything !
Above we have a list of things to be banned, travel on an airliner is quite unplesent enough without the ban police making it even worse just to stop the odd inccident from 0.00001% of the passengers.
So what is proposed above is that 99.9999 % of the passengers who are law abiding suffer for the behaviour of the few !
Apart from a little more control by the staff at the gate and a policy of prosecuting in 100% of these cases ( both criminal & civil) I can't see anything that needs to be done as any other measures are just infringing the rights of the vast majority of the law abiding passengers.
Please remember we are running the airline business for the law abiding passengers, not the very few disruptive idiots and not fall into the mindset of the tabloid press who's instant call is " ban everything "