Have you ever done something illegal without even knowing it?
I used a fake name online, which may be illegal in some states. Now I spend my life in fear of black government SUVs.
Everyone does almost every day.
It's very mild, but I got a traffic ticket for doing something I didn't know was illegal.
Out here we have a lot of middle lanes that you can turn left from. Ahead was a designated left turn lane. There were a lot of cars there already. I lined up in the middle lane, to eventually get into that left turn lane, and a policeman caught me and gave me a ticket. I am VERY careful now about left turn lanes.