dealing with tailgaters... is this legal?

[Fritz]

"I have also long harbored a desire for a rearward facing spring operated high carbon steel spike that would jump out, puncture their radiator, and then pull back into its housing, which would be disguised as a trailer hitch. I even went to the extent of designing such a thing once, but I never built it."

Junior Johnson did and had a good start to a career.

you can also carry a "spare" truckers bomb in a plastic soda bottle, so no one gets hurt, just pi$$ed.