Her pet hate ( like others) is to see graffiti not on trains. The feeling of getting on trains neat & tidy & then someone comes along and completely undoes it. Her suggestion is to have more roving guards on each train service mostly and definitely pm services mainly late nights and weekends. Morning service doesn't seem to be when the graffiti is placed on the carriages- this will make her journey more comfortable!
Editors notes: this seems to a common request from commuters!