I think i know what they are talking about here. This is exactly how paintball was banned in scotland. Dumbass fools started firing ball bearings and marbles at people. The police got a paintball gun, gave it the modifications (if any) and fired it at a dummy. The pellets shattered the mock-skull etc. and the police said "Let's ban Paintball up here".
Plastic bullets are fired from modified paintball guns by the police to control crowds. Imagine getting hit by a paintball, it hurts like hell. Then, imagine getting hit by a plastic paintball, it's gonna hurt even more. But, imagine getting hit by a metal paintball. Therein lies the point of using paintball guns as weapons. I don't think they were converted to fire gunpowder bullets, just ball bearings. Anyway, can't remember the point but sh*t like this is what truly will get this sport banned. it sucks, what can i say...
Fi$h
PS, chris is right, there is no WAY you can fire ammunition (gunpowder bullets) from an airsoft gun, bullets explode, and guns are built to withstand the explosion from the breech. paintball guns and airsoft guns aint...and so cant...