Sir: Student organisations in educational institutions, particularly above the intermediate level, can play a vital role in developing a healthy environment for a progressive society. In Pakistan, the irony is that student organisations tend to, by and large, do anything but this. Unfortunately, such organisations here tend to promote a culture of violence and intolerance and the end result is lots of fights and quarrels between members of student groups. Personally I am in favour of a ban on all student organisations like we have in private educational institutions. ABDUL WADOOD RAJA Rawalpindi