It's up to you if you have pigs and are trying to attract them to a certain area. If your having trouble getting a particular boar hog then I'd say yes. If you don't have pigs around then no probably not worth it at all, just put out more corn. Or give it up and be happy you don't have hogs.
Wingshooting is like sex for me - I love doing it but I'm just not that good at it.