On tagging

Here’s a quick way to stop graffiti on trains. Fit all trains with roof top water tanks that, with the flick of the driver’s switch, will send a steady stream of water cascading down the side of the train.

Colin Kemplen, Matamata. I’m sure Auckland could raise train passenger numbers by advertising to tourists the experience of spontaneous artwork by undiscovered young artists while travelling on our city trains.

Brian Casey, Torbay.