Wouldn't do any good for me to put up a sign. In this small a community I'm known as one of the leading gun nuts around. I have had people that claim to hate guns, hate violence, hate the military, condemn hunting and shooting call me because they have a skunk, coyote, stray dog or possum problem or if they are in the middle of a debate and have a gun question. More than one Pastor has referred to me in a sermon concerning leisure time and "strange" sports (always good as far as I know). Fifty-two weeks a year my phone rings about firearm safety classes. I constantly get calls about membership in the sportsman's club and getting a key to use the range. I've even had a couple times when the phone has rung on a Sunday afternoon to see if someone could borrow ammo, because the figured I'd have it and save them a trip to town. If I put up a BHO sign it would be expected it was a target holder, and then everyone would know what all the holes meant.
By the way, have you ever tried old campaign signs for target holders. They are damn nice!