Should I go to court and explain that I left the property, for my safety?

Illinois. I am a relocation tow operator. The law states that when I hook a vehicle, I cannot leave the property before securing (straps on wheels) etc. about a week ago, I was patrolling a parking lot and had 2 guys throw eggs at my truck. Last night, I went to that lot to patrol and saw 2 similar guys that threw the eggs. I hooked a car and before securing the vehicle I left the property, drove roughly 50 feet on a public road and turned into another parking lot to secure vehicle. A police officer saw me and pulled up and gave me a 120 dollar ticket for an unsecured load. I explained the issue with the eggs and told him I had dated pictures of the eggs but he just wrote the ticket.