We have the Castle Doctrine down here in TX, and a vehicle is considered your "castle". You can use reasonably proportionate force to defend yourself and your property. I think in our bill 250 from a few years back makes it legal for a driver to hit protestors blocking road ways, or drastically reduces the charges for doing so.
Albeit, the best self-defense is to not be there, I believe my bumpers are for more that approach and departure angle improvement should the need arise
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2006 Shadow Mica SR5 v6
1" BL, Fox Racing UCA's, RC 3" N3 Lift, Rock Trix RT110 -12 Wheels, 315/70R17 Goodyear Territory MT, Tacoma Front Bumper, 5th Gen 4R Tire Carrier, Big Lion LED's