Why run around shooting in regular paintball when you can use a tank instead!
Your tank of choice will be a unique 17 tonne FV432 armoured personnel carrier, with specially modified cannons capable of firing 40mm paint rounds.
http://www.funday.com/step3.aspx?PathCode=all&sel=FDAYTB | Daily Mail article: Weapon of Mass Decoration - via Core77 Design
--TwoDragons