Greetings Kim,
It is always exciting to hear about individuals and their leading change. I am not sure we can offer much insight. Do you have an HOA (Homeowners Association) in your neighborhood? Is this something you can bring up during a virtual city council meeting? It may be a good strategy to go through these avenues first to see if there is a protocol you could follow.
A few questions to think about: If you were to start a petition, where would you send the signatures? Who would have the authority to request the individual remove the flag? I would like to support you however you need and these are some questions for you to consider.
If you want to move forward with the petition you may want to consider the following:
Source: https://www.gopetition.com/info/how-to-create-a-winning-petition-campaign