Over a decade ago, I visited the party town of Vang Vieng in Laos , where tragedy struck in recent days with the deaths of six tourists linked to methanol poisoning. Even back then the town was known as a hot-spot for drinking and partying for young people. A mecca for young backpackers, the main attraction in 2011 was tipsy tubing, which involved floating down the river in an old truck inner tyre, stopping off at the half-dozen bars along the way. Super-strength cocktails were served in