These signs dot the lawns of many homes in my neighborhood. However, I have never seen anyone who looks remotely like a member of a Mosquito Squad. Come to think of it, I have never seen a mosquito either. I guess they must be really effective.
Cool sign...Eventhough I have never seen a sign like this at my neighborhood, but a mosquito squad is a familiar sight and he regularly does his job spraying fumigation especially to kill dengue mosquito. It happens usually during a rainy season.
NO mosquitoes -- I'm thinking of calling this telephone number to see if they have a branch near me.