Step 1. Poop in a bag.
Step 2. Grab the bag from the bottom and pull it inside out so it's now acting as a poop glove.
Step 3. Shove the poop under their door handle and then use the bag to wipe excess visible poop away.
They might not know it's because of their boot licking but they sure as hell will start thinking about things a little more.
If anything you'll encourage the trucker to shoot someone, raging with so much renewed hate, because that's exactly the kind of degenerate behavior they associate with the left.
Imagine telling people to shit in a bag and play with it and then having the audacity to call the other guys "shitheads" lmao. Just put a BB under their tire stem and call it a day dude