Sir: Graffiti has become a permanent menace in Hyderabad. The walls of the entire city are full of political slogans, emotional expressions and advertisements for so-called health clinics and other products. This graffiti is an annoyance and has destroyed the beauty of the second largest city of Sindh, which was once called the city of pearls. As it is considered the cheapest form of advertisement, we find bridges, house walls and other properties in both residential and commercial areas full of graffiti. The city authorities must take some bold and courageous steps to punish graffiti gangs. NASIR-UD-DIN SOOMRO Hyderabad