Signal flags? Not a problem. Fly “TRUMP” if you want. And if you really want to get into signals, stand out in the street waving semaphores. If your flag pole is big enough you could add a “MAGA.” And don’t forget you could also use the clothesline? Careful what you spell tho-—you might get an airplane landing in your yard?
I was thinking “Don’t tread on me” but I don’t have a tall enough flagpole!