I live in a residential parking zone where I have to put a sticker on my windscreen with my street on it.
In a long term battle with the council, I have always blacked that out. Nothing special about my car but it's not common, and valuable for parts.
Wouldn't it be easy for the local kiddie gangsters to tour carparks and find the streets of their preferred models?
The councils could easily fix it.
One solution is to go ePermits aka digital permit allocated to your rego.
You sound like that one resident that gives pain to Council customer care for some crazy stuff lmfao!