First, remember that this is a very stupid idea. Also, remember that stupid ideas are what turn into very funny battle scenarios.
The Anti Pants Gun: It is a normal Long Ranged weapon, but instead of destroying a minifig after hitting it, the targeted minifig's pants are removed and moved away as many inches that surpass the Armor of the figure, therefore stripping self-confidence from the fig, and causing it to have -1 to skill on any kind of roll. Also, any kind of bonuses gained from the pants are lost!
Isn't this BrikWarsy?