The Incorporated area I live in issues a warning to EVERYBODY about EVERYTHING in the Spring. Then, they can just go straight to the fines whenever they feel like it.
The year we got into our house we got warnings for trash, weeds, and about 20 other violations. I found out later that they don't even come out and look, they just automatically warn.
It's a BS tactic.
My hometown of Nampa, ID wanted to fine my dad for weeds growing in the ditch at the edge of his property. The city said he was responsible for removing the weeds. I looked up the ordinance they cited. It was for ditches narrow enough that could be stepped across, and didn't include drainage or reclamation ditches. This was a reclamation ditch approximately 25' across that formed the southern border of his property.
When I found this, he called the city back, and told them to pound sand, and said it was their responsibility under the ordinance. Two weeks later, the city was out with a backhoe clearing the ditch.