Quote Originally Posted by CrazyCarl View Post
Well you could always get one of those retina tracking helmets like they use in helicopters that are linked to auto-locking cannons under the nose.

In a case of bikes, I'm not sure where you'd put it and still hold all the ammo I mean... there would be added weight to think about.

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A paint-ball gun should do the job. Doesn't harm but scares the s..t out of such idiots