placed a turret at baron.. baron doesnt attack his turrets.. went to dragon and he attacks the turret though.. also the turrets will not hurt baron if you are not within range of him

i think its suppose to be that way since heimers main attack is pretty much his turrets so if baron were to focus them heim wouldnt be able to help too much with baron, however the reasoning for the turrets not attacking unless range is probably so that you cant solo baron even at a high level without taking teh damages