I've never walked up with tunnel vision to a rub line and said "Ooo I gotta hunt this!" Ok maybe in my younger years.[&:] The times I have had success with them was when topography laid out stellar, distance from bedding and feeding was right, time of year called for the location, multiple deer sign was evident, and a few other things I cant put my finger on. I don't ignore them, but I rarely hunt over them.