At the close of an article on on a upgraded Japanese security robot, it notes:

bq. To upgrade the robot, Sohgo Security is planning to equip it with a fire extinguisher and a paint-pellet gun to mark the clothes of intruders.

bq. “However, we have no intention of developing dangerous tools that will cause physical harm, even to thieves” Tosaka said. “Robots must not have the capability of attacking human beings.”

Anyone want to have a paintball game with a robot?