I dont, most people in our community dont.
The only reason I would place a flag is so that there shouldnt be a Chilul Hashem, Other than that why is a flag significant?
Rabbi Avigdor Miller once said by a shuir, that each Yid should be put a flag, since the Americans are the ones that accepted us, we should have at least some Hakores Hatov and show that we love the country.