I don't hunt rub lines per say. But I don't ignore them.. in fact I study each one extensively. It can really improve ones odds I think to study them. Look for specific markings on the rub.. the height of the rub.. the species of the tree being rubbed (a particular buck will often mark only a specific species).. ETC ETC.

Use your god given common sense.. 2 trees close together where only one tree is rubbed sometimes have deep scratches appearing on the other tree. Scratches caused by tines.. the buck who's rubbing it probably has good tine length depending on the distance of the second tree. His rubs will start to stand out.

A buck with a wide rack will break little twigs and junk many inches on either side of the rub.. you have just identified that buck.

Study the rubs. The more you look at and think about the better you will become. The tiniest occurances will start sticking out like "sore thumbs" to you. You'll find you are more correct than you would think.. the human imagination is a powerful tool.

I don't usually hunt rub lines.. but I am aware of all of the rubs in the area I am hunting and it has put me on good deer at times.

Right time. Right buck. It's what its all about.