Usually they will just check your exhaust pipe for the red dye
and the fee for red dye in the exhaust pipe was told $10,000
20 years ago when I was (only slightly) dumber than I am now...
The farm here was timbered. The guys doing the timbering were (in my mind) major jerks. They destroyed a lot of things supposed to be left behind as they drove their logging machinery around (far was selectively timbered). Still....I get that. Big machines, trees dragging behind them.
They would leave their trash all over the place. Lunch bags? tossed aside. Empty oil jugs (for chainsaws) lobbed into the woods. They evidently had to replace two of the huge tires on their big machine that would drag the trees from cut site to where their huge delimbing/cutting to length machine was.
As they were near finished, I started going out to start to clean things up, create burn piles... came across one of their HUGE slash piles. This thing was probably 100' long, 20' wide and looked to be 30' high but was probably 10' high. I noticed within the burn pile, covered up with a lot of slash, those two huge skidder tires.
After all the other trash I picked up behind them, I finally told them these were in a pile to be burned and need to be gone. His comment back was "nah, just burn them"
Well, I was not going to have the burnt carcas of them laying about for more decades PLUS, turns out it's illegal to burn tires like that.... he was ignoring me. I called Sheriff (or someone) and was told, I had to file a complaint on the land owner (my father in law) to initiate it and it would work down from there.....so I did it.
Mysteriously, a week or three later, the tires were gone.
I was still fuming at what these dolts tried to get away with (they also obsconded off with some very large rocks that were quarried off the farm,. laying there (that I was going to use).
Anyway....back to topic.... it was all I could do to keep from taking 5-gallons of off road diesel and dump it into his/their trucks..... then call the authorities with my "suspicion" that they were using off road in their vehicles. Didn't do it of course, but I was tempted. They would have earned the problems that might have brought them but, I'm generally, a decent person so didn't do it, in spite of all the crap they brought to their visit.