The best thing is have an extra windshield washer sprayer mounted under the rear bump and fill the resevoir with oil. when some jack @ss tailgates me they get a nice windshield full of oil they stop real quick.
Another trick we used to use when riding crotch rockets we would carry pockets full of broken spark plugs. I think you get the idea from there. I always thought it was alot scarier when so @ss would mess with us on the bikes. Sorry but bikes versus cars not a good mix car always wins in carnage standards...
you have a windshield washer bottle mounted up all custom an shit in the rear of your tacoma and its filled with oil?
i don't tailgate people nor can i be passing anything other than a vespa in my 4 banger with 34 inch tires and stock gears lol. but, if for some reason a person squirted oil on my truck on purpose. i think i would just rear end them then beat the ever loving shit out of them if and when they stop.
dude thats completely dangerous if your actually serious which i doubt but, if you are thats not a smart idea you could really hurt someone that way.
its not spy hunter brother its real life and that little invention will most likely get you in trouble.