Re: Ban my backpack? You don't want my money then.
Most of the backpack bans are more about limiting what you can carry to the benefit of concessions. If you take a packed lunch you won't be buying much overpriced food at the concession stands will you.
Security wise what size bag is permitted? Look up Claymore mine, size of a hand bag, a slab of metal on front of which is a slab of plastique with a few hundred ball bearings set in as shrapnel. Even less people friendly version has dense plastic pellets as they are harder to detect and remove from a body.
" When you give up liberty in the name of security etc etc....