The Thai's host the party on a beach. Thousand's of people are invited and it's a nice little earner for all involved from hotel owners to food vendors to taxi operators. Thousands of people consume alcohol all night, which the Thai police ignore, and naturally some make a mess. The beach is cleaned up by Thais in the morning.
Heineken you r blaming the backpackers for making a mess? It's a party for thousands and the beach get's cleaned after dude. The Thai's choose to host this. Get your head checked you annoying dumbwit of a farang.
