> Running a shop to repair something that weighs north of forty tons implies you're a fairly ethical person.
Eh. I wouldn't put that into the necessary column.
Not to mention, there's also the chance that these people saw nothing morally wrong with what they did. They see all these safety features and regulations as nothing more that the government "playing nanny" or whatever.
Or maybe the truckers do and some guy decided he can make a good living off of catering to their particular whims. Also whoever did the modification believed that he knew what he was doing.
Ethics are also a very fluid thing. This guy may show up to work on time every day, great boss, great employee, faithful to his wife, great dad to his kids, pays his taxes, volunteers at the soup kitchen, etc., but thinks that as long as no one is directly hurt by his actions, taking money to perform these modifications is a-ok.