To the individual who wrote on January 16 regarding perverts on the MTR, yes, there is something decent people can do. Do not be afraid to speak up - or shout - when someone is doing something they should not do. 'Stop it!' or 'Cho lo!' ('How rude!') is bound to get attention, and that is exactly what these people do not want. And do not feel bad about embarrassing fellow passengers.

Even better, carry a camera, with or without film. Then turn around and start taking pictures, or pretending to, of anyone who may have been responsible. It is anonymity that these perverts count on. As soon as they are threatened with exposure, pardon the pun, they stop.

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