No, I know regular people - some of which don't know the first thing about car internals, except the concept that if you have a diesel, there are people who will remove some component from it that will lower your total cost of ownership. Two weeks ago, I had a rideshare driver brag to me about how he knows a guy who knows a guy who could do this for him.

I have no first clue how these people get around yearly inspections; I've assumed that particulate filters must not be covered by inspections, though it wouldn't surprise me at all if it turned out people bribe their way through. While the overall levels of corruption in Poland aren't high, the levels of respect for car safety regulations and traffic rules seem pretty low in this country.