Economist: IT WAS political theatre as usual. Two demonstrators from a non-governmental organisation (NGO) called International Rivers disrupted the opening ceremony of the fifth World Water Forum, a week-long gathering in Istanbul of the great and good who work on matters watery which concludes on Sunday March 22nd. The demonstrators unfurled a banner saying “No Risky Dams’ in metre-high letters. They were detained and thrown out of the country. It might have happened at any international …