Sir: I want to draw the attention of the higher authorities towards a serious concern. Whenever the law and order situation of Karachi deteriorates, the government immediately bans pillion riding, as happened last week. In spite of regularly following this practice, the government has been unable to improve law and order in Karachi. The call is for a revised mechanism to control the law and order of the city. Putting bans on pillion riding increases the burden on the already inflation-stricken people, who have to use public transport. Therefore I request the authorities to lift the ban on pillion riding immediately and improve their own crime detection mechanism. SYED JAZIB SHAMIM Karachi