RE: Flamethrower???
If you where to shot water at someones IR tank you would most likely be banned from all events at what ever venue you where attending. Doing actuall damage to some one elses tanks is prohibited. accidents do happen but that is why the 3 feet rule usually is in effect. so your " Flamethrower would need to be able to exceed 3 foot. and again, if you shot water at my large dollar tanks you would swiftly be dealt with accordingly.
My sugestion to you is get off your but, buy a tank and try something instead of speculating all these brainstorms of yours.