Look at this freaken rub!!!
#13
Looks pretty normal to me. I see rubs on trees like that and bigger trees too. Usually see some monster deer in those areas too. The guys from Georgia last year got excited and took pictures of trees like the one you did. They also staked out that area and took home a big buck, bigger than the one on my avatar.
#17
if you look at the oblong shape of it and even the bark below and obove the main area of it you can see that whatever has happened has happened a hell of alot more than once like a tire rub and the heighth is right for a deer rub, I am going to say that it is probably a sign post rub and is rubbed all the time that's why it does'nt have noticable brow tine gouges. I think it has been rubbed alot and probably by a buck that has fairly smooth bases.