See now I don't drink, don't do drugs, can't really stand the British drinking culture so my idea for my own stag-do was for a close group of friends to be rendered unconcious, helicoptered to the wilds of Scotland and dumped in a field (preferably one with werewolves living near by) with no cash or mobile phones and each armed with some form of cutting weapon.
I envisage it being a mixture of Dog Soldiers and Predators.
As the stag I would be allowed some sort of Pusle Rifle - it'd be a right jape I reckon.