You also have to consider medical issues. If the train were to suddenly come to a halt right when a guy took a bit of a hot dog, you can expect that bit to get stuck in his throat and begin choking. Unless a passenger next to him knows how to Heimlich maneuver, that person could easily die . . . a liability which the Metro can easily avoid by banning food aboard the trains.
I hope you forgot a smilie here...
No, that's how sorry of a state our justice system is in. One woman tripped over her own child, broke her leg, sued the store and won!
"The store should not have put my child in the middle of the aisle creating a tripping hazzard."