Who has allowed a digital protest sign to be placed on sea isle

Sea Isle City - Who has allowed a digital protest sign to be placed on sea isle blvd. asking to stop windmills? The sign looks like a county public works sign. This is a county road that's shared with dennis and sea isle. I'm a tax payer who happens to think there is nothing wrong with windmills. This is definitely unethical especially since the mayor is also the county commissioner.