This[1] site seems to track actual fines. I found maybe a dozen fines of individuals. Here is the largest fine of a 'private person' I could find: https://www.enforcementtracker.com/ETid-69. If the database is at all accurate and the description of the violation is correct I would say they were well into Criminal territory and not civil fines.
[1] https://www.enforcementtracker.com